Fathom f212 V2 - Subwoofer JL Audio - Free user manual and instructions
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| Technical Specifications | JL Audio Fathom f212 V2 subwoofer, dual 12-inch driver, 3000 watts RMS power, frequency response from 20 Hz to 200 Hz. |
|---|---|
| Usage | Designed for use in high-end audio systems, ideal for home theaters and audiophile setups. |
| Maintenance and Repair | Regularly check connections and the condition of the speakers. In case of issues, consult a qualified technician for repairs. |
| Safety | Avoid exposure to moisture, do not exceed the recommended power to prevent damage to the speakers. |
| General Information | Weight: approximately 60 kg, dimensions: 61 x 61 x 61 cm, high-quality wood finish, 2-year manufacturer warranty. |
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USER MANUAL Fathom f212 V2 JL Audio
Fathom v2 Powered Subwoofer
IMPORTANT SAFETY INSTRUCTIONS
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
CAUTION
RISK OF ELECTRIC SHOCK DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
- Read the Instructions - All safety and operating instructions should be read before the subwoofer is operated.
- Retain the Instructions - The safety and operating instructions should be retained for future reference.
- HeedWarnings - All warnings on the subwoofer and in the operating instructions should be followed.
- Follow Instructions - All operating and use instructions should be followed.
- Water and Moisture — The subwoofer should NOT be used near water – for example, near a bathtub, washbowl, sink, laundry tub, in a wet basement, near a swimming pool, etc.
- Ventilation — The subwoofer should be situated so that its location or position does not interfere with its proper ventilation. For example, the subwoofer should not be situated on a bed, sofa, rug, or similar surface that may block airflow over the heatsink fins. If placing the subwoofer in a "built-in" installation, ensure that airflow to the heat sink at the rear of the subwoofer is not impeded. Do not cover the subwoofer heatsink with tablecloths, curtains, etc.
- Heat and Flames - The subwoofer should be situated away from heat sources such as radiators, heat registers, stoves, fireplaces, or other devices which produce heat. Do not place candles on top of or near the subwoofer.
- Power sources — The subwoofer should only be connected to a power supply of the type described in the operating instructions or as marked on the subwoofer.
- Power Cord Protection — Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit the subwoofer.
- Cleaning - The subwoofer should be cleaned only as recommended in the operating instructions.
- Nonuse Periods — The power cord of the subwoofer should be unplugged from the outlet when the subwoofer is left unused for long periods of time.
- Lightning and Power Surges - We recommend that you disconnect the subwoofer from the electrical outlet during electrical storms and/or recurring power interruptions to prevent damage due to power surges.
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance instructions in the literature accompanying the product.
WARNING
-
Object or Liquid Entry — Care should be taken so that objects do not fall into and liquids are not spilled onto the subwoofer enclosure. Do not expose the subwoofer to dripping or splashing from liquids. Do not place objects filled with liquids on top of, or near the subwoofer. For example: flower vases, beverages, liquid-fueled lamps, etc.
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Damage Requiring Service - The subwoofer should be serviced by qualified service personnel when:
a. the power-supply cord or plug has been damaged
b. objects have fallen or liquid has been spilled into the subwoofer
c. the subwoofer has been exposed to rain
d. the subwoofer does not appear to operate normally or exhibits a marked change in performance
e. the subwoofer has been dropped or the cabinet has been damaged
f. the subwoofer driver's cone and/or suspension has been physically damaged
- Servicing — The user should not attempt to service the subwoofer beyond what is described in the operating instructions. All other servicing should be referred to qualified service personnel.
- Overloading — Do not overload wall outlets, extension cords, or outlet strips as this can result in a risk of fire or electric shock.
- Grounding — This subwoofer is supplied with a three-prong, grounded power cord. Precautions should be taken so that the grounding means of the subwoofer are not defeated. Defeating the grounding prong on the subwoofer power cord could increase the risk of electric shock and could result in permanent damage to the subwoofer's electronics.
THIS SUBWOOFER IS CAPABLE OF PRODUCING VERY HIGH SOUND PRESSURE LEVELS. PLEASE EXERCISE RESTRAINT IN ITS OPERATION TO PROTECT YOUR HEARING FROM PERMANENT DAMAGE.
FCC COMPLIANCE STATEMENT
NOTE: This equipment has been tested and found to comply with the limits of Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
TABLE OF CONTENTS
Important Safety Instructions: 2-3
Introduction: 4
Product Overview: 5
Placing your Fathom v2 in Your Listening Room: 6-10
Unpacking your Fathom v2: 11
Front Control Panel Layout: 12
Rear Control and Connector Panel Layout: 12-13
Front Panel Controls in Detail: 14-17
Connecting your Fathom v2(s): 18-25
Recommended Setup Procedure: 26-30
Frequently Asked Questions: 31
Cleaning Your Fathom v2: 31
Troubleshooting: 32-33
Limited Warranty / Service Information: 35
Specifications: 36
INTRODUCTION
Congratulations on your purchase of a JL Audio Fathom v2 powered subwoofer system. This product has been critically engineered to deliver exceptional performance in your home theater or audio system for many years to come.
As a company, we are intensely committed to core research into high-performance loudspeaker and amplifier technologies. JL Audio's long-excursion subwoofer driver designs are widely considered as reference standards for linear behavior and high output. We have also focused our efforts to create powerful amplifier and signal-processing technologies specifically aimed at delivering exceptional low-frequency performance. Your Fathom v2 combines these core disciplines within a compact, beautifully crafted package to deliver an unparalleled listening experience.
We sincerely thank you for your purchase and invite you to read this manual thoroughly in order to achieve the highest level of performance with your Fathom v2 subwoofer system. Enjoy.
JL AUDIO TECHNOLOGIES INCLUDED IN FATHOM V2 SUBWOOFERS
DMA-Optimized Motor System
DMA is JL Audio's innovative Dynamic Motor Analysis system aimed at improving dynamic motor behavior. As a result of DMA optimization, loudspeaker motors remain linear in force over an extreme range of excursion and also maintain a highly stable fixed magnetic field over a wide power range. This leads to vastly reduced distortion and faithfully reproduced transients... or put simply: tight, clean, articulate bass.
OverRoll ^※ Surround
The OverRoll surround spans over the driver's mounting flange, utilizing available diameter wasted in conventional speakers. This allows the use of the wider roll necessary to control high-excursions without sacrificing precious cone area.
W-Cone
The W-Cone™ is a unit-body cone assembly that delivers astonishing cone stiffness with minimal mass.
Floating-ConeTM Attach Method
This assembly technique ensures proper surround geometry in the assembled speaker for better excursion control and dynamic voice coil alignment.
Plateau-Reinforced Spider Attachment
This high-integrity suspension attachment relieves stress from the spider material at high-excursions for enhanced reliability.
Elevated Frame Cooling Technology
Delivers cool air, through slots directly above the top-plate, to the voice coil of the speaker. This enhances power handling and sound quality by minimizing dynamic parameter shifts and power compression.
Radially Cross-Drilled Pole Piece
This innovative venting system greatly enhances thermal dissipation and power handling by directing air flow onto the voice coil former, working in conjunction with the Elevated Frame technology.
High-Damping Feedback Circuit
This innovative, discrete control circuit design allows our Class D switching amplifiers to maintain an excellent damping factor for improved transient behavior and fidelity.
PRODUCT OVERVIEW
JL Audio Fathom v2 subwooers combine a state-of-the-art JL Audio subwoofer driver and electronics/amplifier package within a highly optimized enclosure to deliver an exceptional listening experience in your home theater or home audio system.
The subwoofer driver in your Fathom v2 subwoofer system is capable of outstanding linear excursion without distress or audible distortion. This reference-quality driver enables your Fathom v2 to reproduce powerful low-frequency events with stunning impact and unprecedented accuracy. Derived from JL Audio's legendary W7 design platform, the Fathom v2 drivers offer prodigious peak-to-peak excursion capabilities to comfortably handle the dynamics of the most demanding program material.
To get the most from this long excursion driver platform, a tremendous amount of controlled power is needed. Our electronics engineering team conducted an intense analysis of typical program material and its dynamic demands in order to balance current draw and actual output power requirements relative to the system's impedance characteristics. After careful study, precisely engineered switching amplifiers employing patented feedback technology were created to take full advantage of each driver's full excursion envelope. Compared to their predecessors, Fathom v2's have been improved with all new digital signal processing and a 20% increase in amplifier power, further enhancing their outstanding dynamic capabilities.
The beautiful cabinet enclosing the workings of your Fathom v2 is also the result of careful engineering. To contain the pressures created by the Fathom v2 driver, we utilized solid, CNC-cut, MDF material with extensive internal bracing features and advanced assembly techniques.
Your listening room is the other enclosure that affects the way your bass will sound. All rooms create a specific sonic signature, which must be effectively managed to achieve well-balanced low frequency performance. To help properly integrate your subwoofoers with your room's acoustics, all Fathom v2 subwoofoers employ a powerful, Digital Automatic Room Optimization (D.A.R.O.) system. This system deploys eighteen bands of digital equalization to tame room acoustics and deliver spine-tingling sub-bass accuracy.
As you can see from this brief introduction, Fathom v2 subwoofer systems employ many advanced technologies. The contents of this manual will explain the features, guide you through the setup and tuning of your Fathom v2 subwoofer and help you achieve your ultimate low-frequency listening experience.
If you require assistance, we urge you to contact your authorized JL Audio retailer for expert setup advice and service.
IMPORTANT
IMPORTANT! IT IS A VERY GOOD IDEA TO READ THE NEXT SECTION BEFORE UNPACKING YOUR FATHOM v2. UNPACKING THE SUBWOOFER NEAR ITS FINAL LOCATION IS RECOMMENDED.
PLACING YOUR FATHOM v2 IN YOUR LISTENING ROOM:
Your listening room or theater is an integral part of your sound reproduction system. The physical dimensions of the room and its furnishings, materials, doors and windows play an important role in defining how your system sounds.
When you place a sound source in an enclosed rectangular space, "standing waves" are created, resulting from the relationship between the sound's wavelength and your room's dimensions. In other words, standing waves result from sound energy that is trapped in the room as it bounces back and forth between opposing walls. Standing waves in the room create acoustic peaks and dips where the sound is either louder or softer, based solely on your physical position in the room. Energy also "builds up" at the room's boundaries, creating exaggerated bass response at certain frequencies. These fundamental room resonances are called room "modes."
The moral of this mode story is to try and avoid seating positions in standing wave peak or dip regions. It is highly recommended that you place your listening chairs in areas where modal peaks and dips are moderate and do not reinforce one another. The two most obvious areas to avoid are those near the exact center of the room and those close to any of the room's walls.
Just as your listening seat can be in a peak or dip region, so can your subwoofer. When placed in a room corner, a subwoofer maximally excites the room's mode structure, creating the strongest output with the fewest dips. When the subwoofer is pulled away from a corner or wall, the room modes are excited less, which can alter the sound at your listening seat.
Be sure to experiment with both your listening seat position and subwoofer position to find the best solution. Careful experimentation usually leads to a superior sounding system. Use our setup suggestions (illustrated on the opposing page and the following pages) to get you started.
If you cannot avoid placing your sofa against the back wall, or your subwoofer in a less than optimal position, your Fathom v2's Digital Automatic Room Optimization (D.A.R.O.) System can dramatically improve these less-than-ideal situations.
We recommend that you begin by placing your Fathom v2 in the front of the room, near the front left or right speaker. Placing it directly in the front corner of the room will produce the maximum number of peaks and the minimum number of dips in the bass response. This can be advantageous because the Fathom v2's D.A.R.O. system can correct the resulting peaks very effectively, whereas dips in response cannot be corrected via equalization. Dips in response can only be minimized via careful subwoofer and listener placement.
Placing the Fathom v2 near solid walls will reinforce bass response and pulling it away from solid walls will decrease bass. Increasing the distance between the subwoofer and the walls may help to smooth upper bass response in some rooms.
We recommend that you avoid placing the Fathom v2 near windows to prevent rattling and sound transmission to the outside world.
If you are planning to install your Fathom v2 inside a cabinet, please refer to the guidelines on page 8.
SPECIAL CONSIDERATIONS FOR BUILT-IN INSTALLATIONS
Fathom v2 subwoofer are designed to be "built-in" friendly. All typically needed controls are located on the front panel above the woofer. A Fathom v2 can be easily integrated into custom cabinetry by following a few simple guidelines.
1) Allow 4 inches (10cm) of clear space behind the amplifier panel for adequate cooling and connector clearance.
2) On all other sides (except the bottom), allow at least 2 inches (5cm) clearance for adequate ventilation.
3) While the Fathom v2 generally runs only warm during spirited operation, we do recommend that adequate heat vents are included in any custom cabinet which encloses the Fathom v2. A pair of 3 inch (7.5 cm) diameter vents near the bottom of the cabinet and near the top of the cabinet, will allow cool air to circulate over the amp panel of your Fathom v2 subwoofer system keeping it cool and happy.
4) Your Fathom v2 subwoofer is capable of moving substantial quantities of air. If the front of the Fathom v2 is covered by a custom grille, the grille size must be AT LEAST equal to the woofer cone area for each model to ensure the output is not choked by the custom cabinet. Refer to the chart below for recommended vent areas for each model.
Model Recommended Custom Grille Vent Area
| f110v2 ≥ 60 in | \( {}^{2}\left( {{386}{\mathrm{\;{cm}}}^{2}}\right) \) |
| f112v2 ≥ 85 in | \( {}^{2}\left( {{550}{\mathrm{\;{cm}}}^{2}}\right) \) |
| f113v2 ≥ 108 in | \( {}^{2}\left( {{700}{\mathrm{\;{cm}}}^{2}}\right) \) |
| f212v2 ≥ 170 in | \( {}^{2}\left( {{1100}{\mathrm{\;{cm}}}^{2}}\right) \) |
Rear-view of cabinet install (f110, f112, f113):
Rear-view of cabinet install (f212):
Using Two Fathom v2s
When using two Fathom v2s, try placement near the front corners of the room, at diagonally-opposite corners of the room, or at the center points of opposing walls as shown at right.
Experimentation with subwoofer and listener placement is recommended to achieve the best results - the benefits can be substantial.
High-resolution measurements and professional system calibration are recommended for the best possible results & system performance.
Recommended Subwoofer Placement Options for Two Fathom v2s
Recommended Subwoofer Placement Options for Three Fathom v2s
Recommended Subwoofer Placement Options for Four Fathom v2s
Using Three or Four Fathom v2s
Research indicates that the smoothest bass response for a large listening area can be achieved using four subwoofoers, placing one at the midpoint of each of the four walls (although using two or three subwoofoers can be almost as good).
Experimentation with subwoofer and listener placement is recommended to achieve the best results - the benefits can be substantial.
High-resolution measurements and professional system calibration are recommended for the best possible results & system performance.
UNPACKING YOUR FATHOM v2
Now that you have determined your Fathom v2's position in the room, you can proceed with unpacking it near its intended location.
Unpack this box close to where the subwoofer will be placed. The subwoofer is PACKED upside down. This box must be flipped over CAREFULLY to remove the subwoofer and minimize effort.
IMPORTANT
IMPORTANT! DUE TO THE WEIGHT OF THE FATHOM V2 SUBWOOFER, PLEASE EXERCISE CAUTION WHILE UNPACKING AND POSITIONING IT TO PREVENT INJURY. IF POSSIBLE, ENLIST THE HELP OF A SECOND PERSON TO FACILITATE THE PROCESS. TO MINIMIZE THE RISK OF INJURY, BEND YOUR KNEES AND LIFT WITH YOUR LEGS, NOT YOUR BACK.
Detailed instructions on unpacking the subwoofer:
- Place the carton on the floor near its intended location in the room.
- Open the top of the carton (observe markings on carton) and remove the manual, calibration microphone and power cord.
- Temporarily remove the split-foam packing inserts.
- Untie and loosen the protective cloth cover to make later removal easier (do not remove at this time). When you open the cloth cover, you are looking at the bottom of the subwoofer cabinet.
- Replace the split-foam inserts to protect the subwoofer's cabinet while unpacking.
- Gently flip the box on its side, folding back the carton flaps to the outside.
- Holding the carton flaps back, gently flip the carton onto its top (open end).
- Pull the carton straight up until it clears the subwoofer and place to one side.
- Remove the one-piece foam insert and place in the carton.
- Remove the plastic bag and place in the carton.
- Tilt the subwoofer forward (toward its grille) to remove the rear split-foam insert first. Then tilt the subwoofer in the opposite direction (towards its amplifier panel) to remove the remaining split-foam insert. Place both split-foam inserts in the carton.
- Remove the protective cloth cover and place in the carton.
IMPORTANT
IMPORTANT! PLEASE RETAIN ALL PACKAGING FOR SAFE TRANSPORTATION OF THE SUBWOOFER AND FOR ANY FUTURE SERVICE NEEDS.
Front Control Panel (All Models)
The labeled Figure below depicts the front control panel of a Fathom f113v2 subwoofer. The controls layout is the same for all Fathom v2 models.
Rear Controls and Connectors (f112v2, f113v2, f212v2 Models)
The labeled Figure below depicts the rear panel of a Fathom f113v2 subwoofer. The controls and connectors layout is the same for the Fathom f112v2 & f212v2.
Rear Controls and Connectors (f110v2 Model)
The labeled Figure below depicts the rear panel of a Fathom f110v2 subwoofer.
*The rear control and connector detail images throughout this manual depict other Fathom v2 models and are not representative of the arrangement of the f110v2.
FRONT PANEL CONTROLS IN DETAIL
Power Switch
The "Power" switch determines the operational readiness of the Fathom v2 subwoofer and should be the only switch used to turn the Fathom v2 on and off. Do not use a power strip switch, switched outlet or any other external switch as these may result in undesirable and potentially damaging transient pops. Do not unplug the Fathom v2's AC power cord while the unit is turned on. The power switch has three positions:
"On": The Fathom v2 is fully powered at all times. Front panel lights are on unless they have been turned off via the "Lights" switch.
"Off": The Fathom v2's internal power amplifier is powered down. In this state, a negligible current draw will exist for operating the main power relays. All front panel lights are off.
"Auto": The Fathom v2 will power up its internal amplifier when an audio signal is present at any of its inputs and will power down the internal amplifier if no signal has been detected at its inputs for thirty (30) minutes. When dormant, the Fathom v2 will draw a very small amount of current (< 5 watts) to power its signal-sensing circuitry. Front panel lights will turn off when the Fathom v2 powers down and light when the Fathom v2 powers up (unless they have been turned off via the "Lights" switch).
In the unlikely event that the Auto feature is not sensitive enough for a particular system, use a Y-cable adaptor to split the incoming signal into both RCA or XLR inputs on the Fathom v2. This will increase the input sensitivity by 6 dB. Please be aware that if the Auto sensitivity is too high or if there is significant noise on the input cable, the Fathom v2 may not turn off as desired. If this happens, remove the Y-cable adaptor or look for the noise source in the upstream components.
Digital Automatic Room Optimization (D.A.R.O.)
A powerful feature of the JL Audio Fathom v2 subwoofoers is their innovative Digital Automatic Room Optimization (D.A.R.O.) technology. This one-touch system includes 18 bands of digital equalization to eliminate the largest acoustic response peaks in your home theater at the main listening seat, greatly improving the in-room low-frequency response. Calibration of the D.A.R.O. system is fully automated. Please consult the next section of this manual for details on how to use the D.A.R.O. system.
Using the included JL Audio calibration microphone, the D.A.R.O. calibration procedure takes less than three minutes. In brief, you will connect the included microphone to the "Calibration Mic." input, press the Calibrate button, and then hold the microphone at ear height in your main listening seat during the test. A noise sequence will be played through the Fathom v2 subwoofer, and the room response will be automatically measured, analyzed and equalized to eliminate the single largest acoustic room response peak at your listening seat. For detailed instructions on the D.A.R.O. setup procedure, refer to pages 29-30.
Calibration Mic. Input
This input is for connecting the supplied JL Audio calibration microphone to the Fathom v2 subwoofer. Connect one end of the supplied cable to the microphone and the other end to this jack prior to using the D.A.R.O. system. The D.A.R.O. system is specifically calibrated to this microphone and its connection scheme is specific to the supplied microphone. The calibration sequence will not operate when a different microphone is connected or if no microphone is connected.
IMPORTANT
Demo Button
The Demo button triggers a 20 second long tone sequence that briefly demonstrates the range of the Fathom v2 subwoofer. The Demo function is useful for showcasing the output capability of the Fathom v2 and to verify that the Fathom v2 (or multiple Fathom v2s) are operational during system troubleshooting.
The Demo button is also used (in combination) to clear (return to flat) the D.A.R.O. equalizer settings. To clear the D.A.R.O.'s settings & turn off the Calibrate light, press and hold the Demo button and then press the Defeat button. Please note that you must perform this button sequence quickly. If you hold the Demo button for more than 2 seconds without touching the Defeat button, the Demo tones will start. Should this happen, simply wait for the Demo sequence to end and try again.
Defeat Button
If "Demo" or "Calibrate" is pressed while the defeat function is active, "Defeat" is automatically canceled. No other front panel controls will alter the D.A.R.O. Defeat state. The Defeat setting is stored in non-volatile memory and will not change even if power is disconnected.
The Defeat button is also used (in combination) to clear (return to flat) the D.A.R.O. equalizer settings. To clear the D.A.R.O.'s settings & turn off the Calibrate light, press and hold the Demo button and then press the Defeat button. Please note that you must perform this button sequence quickly. If you hold the Demo button for more than 2 seconds without touching the Defeat button, the Demo tones will start. Should this happen, simply wait for the Demo sequence to end and try again.
Calibrate Button
During the D.A.R.O. test sequence, the Calibrate button's green LED will blink quickly to alert the user to two special conditions:
-
"JL Audio Microphone NOT Connected": If you forget to connect the mic before trying to start a Calibration you will get this alert. Press the Calibrate button once to cancel the alert, connect the D.A.R.O. microphone, and try again.
-
"Inappropriate Sound Level for D.A.R.O. Calibration": Since the D.A.R.O. sequence is completely automatic, this alert likely indicates a problem with the microphone. Press the Calibrate button once to cancel the alert. Ensure that the JL Audio microphone is properly connected and try again. For further help, please refer to Troubleshooting on page 33.
Input Mode Indicators
The Input Mode indicator LEDs show the input mode, either "Master" or "Slave", selected by the switch on the Fathom v2's back panel (unless the "Lights" switch is set to "off"). For further details, see page 20.
Level Mode
The two-position Level Mode switch allows you to select between the following modes:
"Reference": In this mode, the Master Level control knob has no effect on the Fathom v2's output level. Use this setting if you will primarily be controlling the subwoofer level via your receiver or preamplifier/processor. For those of us with small children or overenthusiastic teenagers, this mode of operation will prevent direct manipulation of the Master Level.
"Variable": In this mode, the Master Level control knob determines the output level of the Fathom v2 subwoofer. This mode is also useful when level matching the Fathom v2 subwoofer to a pair of stereo speakers in a two-channel system.
Master Level Knob
The Master Level Knob is used to control the output level of the Fathom v2 when the Variable Level mode is selected on the front control panel.
When rotated fully counter-clockwise, the Fathom v2's output will be fully muted. When at the "0" or vertical position, the Variable gain level matches the Reference level setting. When turned fully clockwise, the Fathom v2's output level is 15 dB higher than the Reference setting.
Lights
The "Lights" selector switch allows the user to select one of three indicator light modes.
"Off" turns off all of the front panel LED's at all times.
"Dim" sets all of the front panel LEDs to a low brightness level when the Fathom v2 is turned on.
"On" sets all of the front panel LEDs to full brightness level when the Fathom v2 is turned on.
IMPORTANT! WHEN TROUBLESHOOTING OR CALIBRATING THE D.A.R.O. FEATURE, MAKE SURE THAT THE "LIGHTS" SWITCH IS SET TO "DIM" or "ON."
LP Filter
The Low Pass (LP) Filter selector switch determines the operating mode of the Fathom v2's built-in low pass filter.
"Off" defeats the low pass filter, completely removing this circuit from the signal path.
"12 dB" sets the roll off slope of the low pass filter to a 12 dB per octave slope (Butterworth alignment).
"24 dB" sets the roll off slope of the low pass filter to a 24 dB per octave slope (Linkwitz-Riley alignment).
The 24 dB setting more aggressively attenuates high frequencies above the LP Frequency setting (see below). If you are using the Fathom v2's built-in low pass filter, experiment with the LP Filter slope setting to achieve the best transition to your satellite speakers. If you prefer to use the filters and bass management features in your receiver or preamplifier, defeat the on-board filter by selecting the "Off" position.
LP Freq
The Low Pass (LP) Frequency selector knob allows the user to choose the roll-off frequency of the Fathom v2's internal low pass filter. The frequency is variable between 30Hz (full counter-clockwise) to 130Hz (full clockwise). This knob does not affect the input signal in any way if the LP Filter switch is set to "Off". 80Hz is a commonly used filter frequency and usually serves as a good starting point for adjustments.
IMPORTANT
E.L.F. Trim
The Extreme Low Frequency ("e.l.f. trim") knob allows the user to apply a certain amount of signal equalization at 24 Hertz (extremely low bass). At full counter-clockwise rotation, the signal at 24Hz is cut by 12 dB. At "0" the equalizer is set flat for zero contribution to the signal. At full clockwise rotation, the signal at 24Hz is boosted by 3 dB.
The e.l.f. trim feature is useful for tailoring the Fathom v2's very low frequency output for your particular room. Adding some boost can make certain material feel more exciting. Using the cut function can help to compensate for room or boundary gain in the low frequencies. Room boundaries and the room's finite (limited) size naturally cause very low frequencies to be boosted relative to other parts of the signal. As such, using the e.l.f. trim feature to cut the lowest frequencies can help to tame "bloat" or unnatural sounding low bass in small to medium sized rooms (and can also reduce unwanted vibrations in the room or throughout the house).
Polarity
The Polarity switch allows the user to select between normal (0 deg) and reversed (180 deg) signal polarity. The Polarity switch will primarily affect the small frequency range around the crossover point between your subwoofer and satellite speakers.
Unlike the Phase control, which effectively adds time delay, the Polarity switch produces an instantaneous reversal of the signal's amplitude peaks. For example, if at a given reference point a sine wave has an amplitude peak, by flipping the phase switch you instantly convert that peak into a trough or amplitude dip. Because the effect of the Polarity switch is immediate, it compliments the operation of the Phase control and cannot be replaced by it.
When placing your Fathom v2 in the room, experiment with the Polarity switch before adjusting the "Phase" control. Either position of the Polarity switch may provide a smoother transition between your Fathom v2 subwoofer and the satellite speakers. Use source material with good mid and upper bass content for evaluation.
Phase
The Phase control knob allows the user to adjust the "timing" of the subwoofer output relative to the main speakers. The Phase control will primarily affect the small frequency range around the crossover point between your subwoofer and satellite speakers. Phase settings between 0 degrees (full counterclockwise rotation) and 270 degrees (full clockwise rotation) are possible. The Phase control's labels are referenced to a frequency of 80Hz since this is the most common crossover point between satellite speakers and a subwoofer.
Speaker, subwoofer, and listening seat positions vary greatly in home theater installations. Since physical positioning of speakers relative to the room boundaries, and each other, greatly affects the perceived quality of sound output, sometimes it is helpful to delay the subwoofer output. This is exactly what occurs when you turn the Phase control beyond 0 degrees.
Once your Fathom v2 has been placed in your listening room to give you the smoothest overall sound and after you have determined the optimum "Polarity" switch position (see preceding section), experiment with the position of the Phase control. Using familiar source material with good mid and upper bass content, adjust the Phase control and listen for better defined mid-bass and a smoother transition between the subwoofer and satellite speaker systems. If no single setting sounds better than another, leave the Phase control at 0 degrees.
CONNECTING YOUR FATHOM v2
Balanced Inputs
If your home-theater receiver or preamplifier/processor provides balanced outputs, the Fathom v2's balanced inputs are the preferred connection. Balanced connections are used extensively in professional studios and sound reinforcement applications for a number of very good reasons. Besides ensuring proper grounding between components, balanced signal transmission is designed to cancel induced cable noise from the surrounding environment (particularly important with long cable runs). The bottom line is that your system will be far less likely to exhibit humming or other extraneous noises if you use balanced connections.
The Fathom v2 subwoofer feature individual left and right balanced input connections with XLR "combo" jacks. These special jacks accept either a three-pin male XLR connector or a "tip-ring-sleeve" (TRS) 1/4-inch (6.3mm) connector for compatibility with a wide range of equipment.
For systems with a mono subwoofer or "LFE" channel connection, only the jack labeled "Left or Mono" will be used. This applies to most modern multi-channel receivers and preamplifier/processors. Separate left and right input jacks are provided for systems without a dedicated mono subwoofer connection. This typically applies to two-channel audio equipment.
Appropriate balanced cables are available from your JL Audio dealer and are not included with the Fathom v2.
Technical Notes:
- Do not use the balanced inputs with unbalanced signals via adaptors. The unbalanced inputs of the Fathom v2 are optically isolated and preferable in situations where only an unbalanced signal source is available. Balanced input impedance is 20 kohms.
- Input connectors are configured according to Audio Engineering Society recommendations for balanced signal cables as follows:
XLR Connection
Pin 1:Shield
Pin 2:Positive
Pin 3: Negative
TRS connection:
Tip: Positive
Ring: Negative
Sleeve:Shield
IMPORTANT! IF YOUR RECEIVER OR PREAMPLIFIER/PROCESSOR DOES NOT HAVE XLR OR 1/4-INCH TRS BALANCED OUTPUTS, PLEASE REFER TO THE "UNBALANCED INPUTS" SECTION ON PAGE 19 FOR INPUT CONNECTION INFORMATION. DO NOT ATTEMPT TO CONNECT UNBALANCED OUTPUTS TO THE FATHOM V2'S BALANCED INPUTS VIA ADAPTORS.
The Left and Right inputs on the Fathom v2 are internally summed to a single mono channel. Since the Fathom v2 is inherently a "mono" or single channel device, you can use the Left and Right inputs for the master Fathom v2 and then distribute the summed mono signal to additional slave Fathom v2s in the system.
IMPORTANT
IMPORTANT
Unbalanced Inputs
The Fathom v2 subwoofer features individual left and right unbalanced RCA-type input connectors. These are the most commonly used connectors for home audio applications and must be used if your receiver or preamplifier/processor does not provide balanced outputs. While unbalanced connections are not as noise-immune as a balanced connection, Fathom v2 subwoofer employs optical isolation on the unbalanced inputs to minimize the possibility of noise in your system.
For systems with a mono subwoofer or "LFE" channel connection, only the RCA-type jack labeled "Left or Mono" will be used. This applies to most modern multi-channel receivers and preamplifier / processors. Separate left and right RCA-type input jacks are provided for systems without a dedicated mono subwoofer connection. This typically applies to two-channel audio equipment.
Technical Notes:
- When balanced outputs are not available on the signal source, you must use the RCA-type unbalanced inputs. Fathom v2s feature optical isolation circuitry on the unbalanced inputs to minimize the likelihood of ground loop induced noise. Unbalanced input impedance is 50 kohms.
- Connections are industry-standard for unbalanced signal cables as follows:
RCA-type connection:
Tip: Positive
Sleeve: Negative
IMPORTANT! IF NOISE EXISTS AFTER CONNECTION, FATHOM V2s ALLOW FOR GROUNDING OR ISOLATION OF THE UNBALANCED INPUTS. PLEASE REFER TO THE "INPUT MODE SWITCHES" SECTION ON PAGE 20 OF THIS MANUAL FOR FURTHER INFORMATION ON MINIMIZING NOISE.
Input Mode Switches:
Two switches are located on the rear panel to control unbalanced signal grounding and master/slave operation.
"Grounded / Isolated" Switch
The "Grounded / Isolated" Input Mode switch affects only the unbalanced RCA inputs and is designed to facilitate a quiet, hum-free connection to your audio or home theater system. This feature is included to deal with the signal grounding issues often encountered in home theater systems when several components from different manufacturers are interconnected.
The Fathom v2 ships with this switch in the "Isolated" mode. If, with all system components connected and turned on (but no source material playing), you hear a continuous low-frequency hum through your Fathom v2, flip this switch to the "Grounded" position and evaluate the difference in the noise level. Use whichever switch position provides the least hum or noise.
IMPORTANT! PLEASE NOTE THAT CHANGING ANY COMPONENT IN THE OPTIMIZED SYSTEM (RECEIVER, AMPLIFIER, DVD PLAYER, CABLE OR SATELLITE BOX, ETC.) COULD ALTER THE SIGNAL GROUNDING SCHEME AND CAUSE HUM TO APPEAR IN YOUR PREVIOUSLY QUIET SYSTEM. IF YOU ADD OR CHANGE AN UPSTREAM COMPONENT IN YOUR HOME THEATER SYSTEM, YOU MAY NEED TO REVISIT THIS INPUT MODE SETTING ON THE FATHOM V2 SUBWOOFER FOR OPTIMUM NOISE PERFORMANCE. CABLE & SATELLITE BOXES ARE PARTICULARLY TROUBLESOME IN THIS WAY.
Master / Slave Switch
The Fathom v2s are designed to easily accommodate the implementation of multiple subwoofer in your home theater system through a master/slave connection chain. This method allows you to utilize the signal processing features of one Fathom v2 to centrally control multiple Fathom v2s in the room. Master/Slave functionality also makes it possible for the D.A.R.O. system to optimize the response of a multiple subwoofer installation.
The Fathom v2 ships with this switch in the "Master" position. If you are using a single Fathom v2 you will use the "Master" position and you need not concern yourself with this section any further.
If your installation incorporates two or more Fathom v2s, you will designate one Fathom v2 as the "Master" and all others in the system as "Slave" subwoofer via the "Master/Slave" switch on the rear amplifier panel of each Fathom v2. LED's on the front panel of the Fathom v2 are provided to indicate whether the "Master" or "Slave" mode is selected for a given subwoofer.
From the Fathom v2 operating in "Master" mode, the "Output to Slave" signal carries any signal processing selected on the Master Fathom v2 (including the Master Level setting and D.A.R.O. processing) to further Fathom v2s operating in "Slave" mode. "Slave" subwoofer signal processing and level controls will be inoperable. In this mode, the user does not have to worry about level, crossover, and other settings for the slave subwooers.
Technical Notes:
- Selecting the "Slave" position defeats all user-definable signal processing and the master level control. Because of this, there are some special situations in which you may want to operate a single Fathom v2 in "Slave" mode. If you are utilizing outboard signal processing and level-matching controls, activating the "Slave" mode will prevent anyone from affecting system parameters with the manual controls on the Fathom v2.
IMPORTANT! PLEASE REFER TO THE "SYSTEM CONNECTION DIAGRAMS" ON PAGES 22-25 FOR MORE INFORMATION ON USING THE INPUT / OUTPUT CONNECTIONS.
"Output to Slave" Connector
If you are operating more than one Fathom v2 subwoofer in one home theater system, you will designate one Fathom v2 as the Master (see page 20), and then feed signal from it to the remaining "Slave" Fathom v2s via this balanced XLR output. The "Output to Slave" cable can be connected to the "Left or Mono" balanced XLR input on the next Fathom v2. When a Fathom v2 is in "Slave" Mode, its "Output to Slave" connection can be used to pass signal to further Fathom v2s operating in "Slave" mode.
The "Output to Slave" connector is designed to be used as follows:
1) From the "Master" Fathom v2's "Output to Slave" connector to the first "Slave" Fathom v2's "Left or Mono" XLR balanced input.
2) From the first "Slave" Fathom v2's "Output to Slave" connector to the second "Slave" Fathom v2's "Left or Mono" XLR balanced input.
3) From the second "Slave" Fathom v2's "Output to Slave" connector to the third "Slave" Fathom v2's "Left or Mono" XLR balanced input. Etc, etc. (up to ten Fathom v2s may be connected in this configuration). Appropriate balanced cables with XLR terminations are available from your JL Audio dealer and are not included with the Fathom v2.
Technical Notes:
- The "Output to Slave" signal carries any signal processing selected on the Master Fathom v2 (including the Master Level setting and D.A.R.O. processing) to further Fathom v2s operating in "Slave" mode.
- From Fathom v2s operating in "Slave" mode, the "Output to Slave" signal is an exact, buffered replica of the balanced input signal, making this method of signal distribution preferable to using Y-adapters or splitters.
- Use only shielded, connection cables with high quality XLR connectors for Master/Slave connection. Never use unbalanced cables with adaptors.
IEC-Style AC Power Connector
The IEC-style AC cord receptacle receives the heavy-gauge, 6 ft. (1.8 m) long, power cord included with your Fathom v2 subwoofer. Fathom v2s sold in different parts of the world are configured for each market's electrical system and include appropriate plugs on their power cords. Please note the voltage markings next to the AC connector and make sure you are only powering your Fathom v2 from a receptacle that matches these markings. Do not use any AC power cord other than the one supplied with the Fathom v2. For information about the Main Fuse Holder, please see the Troubleshooting section of this manual.
The Fathom v2 subwoofer is a very powerful device and can draw a lot of current. If too many components are connected with a Fathom v2 subwoofer to one electrical outlet, you risk tripping a household circuit breaker during very demanding program material. If this happens, split the Fathom v2 and other components between two AC electrical circuits. If possible, for maximum performance, dedicate an AC circuit to each Fathom v2.
SYSTEM CONNECTION DIAGRAM 1: One Fathom v2 to Home Theater Receiver or Home Theater Preamp/Processor
Most home theater receivers and preamp/processors provide a single (mono) subwoofer output. When connecting a mono subwoofer output to your Fathom v2, you will only use the Fathom's "Left or Mono" input.
Two connection types are available for connecting the Fathom v2 to your home theater system: balanced (XLR or 1/4-inch TRS connector) and unbalanced (RCA-type connector). Balanced connections provide superior noise rejection and ensure proper grounding between components. If your receiver or processor has balanced outputs, we highly recommend that you use them.
In the connection diagram at left, balanced connections are shown as solid lines, unbalanced connections are shown dotted. You will only use one of these input connection methods (not both).
WARNING! TURN OFF THE FATHOM v2 AND ALL OTHER EQUIPMENT IN THE SYSTEM BEFORE MAKING OR CHANGING ANY CONNECTIONS!
WARNING
SYSTEM CONNECTION DIAGRAM 2: Multiple Fathom v2s to Home Theater Receiver or Home Theater Preamp/Processor
To greatly simplify using multiple subwoofoers in a single home theater system, Fathom v2s incorporate a "Master/ Slave" signal distribution system. This allows control of all the Fathom v2s in a system from a single "Master" unit.
First, you will select a Fathom v2 subwoofer as the "Master" via its upper "Input Mode" switch. Generally, you will designate the Fathom v2 closest to the receiver/preamp as the master. In some cases; for example, when the control panel of certain units is difficult to access, you may prefer to designate the one which is easiest to access as the master.
Two connection types are available for connecting the master Fathom v2 to your home theater system: balanced (XLR or 1/4-inch TRS connector) and unbalanced (RCA-type connector). Balanced connections provide superior noise rejection and ensure proper grounding between components. If your receiver or processor has balanced outputs, we highly recommend that you use them to connect to the Fathom v2 designated as the master.
In the connection diagram at left, balanced connections are shown as solid lines, unbalanced connections are shown dotted. You will only use one of these input connection methods for the Fathom v2 designated as the master (not both).
The remaining Fathom v2s in the system will be configured as "Slave" units via their upper "Input Mode" switches. Using balanced XLR cables, you will connect the master Fathom v2's "Output to Slave" to the "Left or Mono" balanced input of the first slave Fathom v2. That slave unit's "Output to Slave" connector will feed the "Left or Mono" input of the next slave unit via another balanced XLR cable. Subsequent slave units will be connected in the same manner.
IMPORTANT
Connections between the "Master" and "Slave" Fathoms and between "Slave" Fathoms are via balanced XLR cables ONLY.
WARNING
WARNING! TURN OFF THE FATHOM v2 AND ALL OTHER EQUIPMENT IN THE SYSTEM BEFORE MAKING OR CHANGING ANY CONNECTIONS!
WARNING! TURN OFF THE FATHOM v2 AND ALL OTHER EQUIPMENT IN THE SYSTEM BEFORE MAKING OR CHANGING ANY CONNECTIONS!
SYSTEM CONNECTION DIAGRAM 3: One Fathom v2 in Mono to Two-Channel Audio System
When connecting a Fathom v2 (or multiple Fathom v2s) in mono to a two-channel audio system you will use both the "Left or Mono" and the "Right" inputs. Summing circuitry in the Fathom v2's input section will sum the stereo signals to mono.
We strongly recommend that you use a high-quality active crossover, like the JL Audio CR-1, to divide your preamplifier's signals prior to connection to the Fathom v2 and to the amplifier driving your main speakers. This will allow you to filter low frequencies out of the signals driving the main speakers, resulting in better performance.
If you are not using an active crossover and are comfortable running your main speakers full-range, you can split your preamplifier's output signals using appropriate Y- connectors in place of the active crossover shown in the diagram.
Two connection types are available for connecting the Fathom v2 to your two-channel audio system: balanced (XLR or 1/4-inch TRS connector) and unbalanced (RCA-type connector). Balanced connections provide superior noise rejection and ensure proper grounding between components. If your preamplifier or active crossover offers balanced outputs, we highly recommend that you use them.
In the connection diagram at left, balanced connections are shown as solid lines, unbalanced connections are shown dotted. You will only use one of these input connection methods (not both).
NOTE: If desired, additional Fathom v2s can be connected in "Slave" mode to the Fathom v2 connected as shown on this diagram. See "Connection Diagram 2" on page 23 for slave connection explanation.
WARNING
SYSTEM CONNECTION DIAGRAM 4: Two Fathom v2s in Stereo to Two-Channel Audio System
When connecting two Fathom v2s in stereo to a two-channel audio system you will only use the "Left or Mono" inputs of each Fathom v2. The upper "Input Mode" switch on each Fathom v2 will be set in the "Master" position.
We strongly recommend that you use a high-quality active crossover, like the JL Audio CR-1, to divide your preamplifier's signals prior to connection to the Fathom v2 and to the amplifier driving your main speakers. This will allow you to filter low frequencies out of the signals driving the main speakers, resulting in better performance.
If you are not using an active crossover and are comfortable running your main speakers full-range, you can split your preamplifier's output signals using appropriate Y-connectors in place of the active crossover shown in the diagram.
Two connection types are available for connecting the Fathom v2s to your two-channel audio system: balanced (XLR or 1/4-inch TRS connector) and unbalanced (RCA-type connector). Balanced connections provide superior noise rejection and ensure proper grounding between components. If your preamplifier or active crossover offers balanced outputs, we highly recommend that you use them.
In the connection diagram at right, balanced connections are shown as solid lines, unbalanced connections are shown dotted. You will only use one of these input connection methods (not both).
NOTE: If desired, additional Fathom v2s can be connected in "Slave" mode to each Fathom v2 connected as shown on this diagram. See "Connection Diagram 2" on page 23 for slave connection explanation.
WARNING
WARNING! TURN OFF THE FATHOM v2 AND ALL OTHER EQUIPMENT IN THE SYSTEM BEFORE MAKING OR CHANGING ANY CONNECTIONS!
RECOMMENDED SETUP PROCEDURES
1) Preparation for Setup Process: 26-27
2) Level Setting: 28
3) Polarity/Phase Adjustment: 28
4)Experiment with Location: 28
5) Apply D.A.R.O: 29-30
6) Adjust E.L.F. Trim: 30
PREPARATION FOR SETUP PROCESS:
Please confirm the following system settings before beginning the setup process. This will ensure a neutral starting point and an effective setup of your subwoofer system.
On your Home Theater Receiver or Preamp/Processor:
Before beginning setup of your Fathom v2 subwoofer system we recommend that you set your receiver or preamp/processor as follows (please turn off all Fathom v2s in the system via their front panel power switches prior to making these adjustments):
1. Speaker Size
In the speaker setup menu of your receiver or preamp/processor, set up all of your high-frequency speakers as "small" with a crossover point of 80Hz . This will send ALL bass to the Fathom v2(s).
2. Speaker Distance
In the speaker setup menu, properly set all speaker distances to the primary listening seat, including the subwoofer's distance. Use a tape measure to determine these distances (time coherence is important.) If multiple Fathom v2s are being used, average their distances to the primary listening seat and use that number to set the subwoofer distance.
3. Subwoofer Level
Set the subwoofer level in the receiver or preamp/processor to "0" or its middle position.
4. Tone Controls / Equalizers
Set all tone controls to "0" and defeat all equalizer features.
On your Active Crossover or Bass Management Processor:
If you are using an active crossover or bass-management processor, we recommend that you set it as follows before beginning setup of your Fathom v2 subwoofer system (please turn off all Fathom v2s in the system prior to making these adjustments):
1. Low-Pass Filter Frequency
Select a low-pass filter frequency of 80Hz (24 dB/octave slope)
2. High-Pass Filter Frequency
Select a high-pass filter frequency of 80Hz (24 dB/octave slope)
3. Low-Pass (Subwoofer) Output Level
Set the subwoofer output level to "0" or its middle position.
On the Fathom v2's Front Panel:
Please turn off the home theater receiver or preamp/processor to make these adjustments.
1. "Power" Switch
Flip each Fathom v2's "Power" switch to the "On" position.
2. "Lights"Switch
Flip each Fathom v2's "Lights" switch to the "On" position. If you don't see any lights on the front panel, you may have forgotten to plug the Fathom v2 in or there may be a problem with the electrical circuit.
3. "Input Mode" Indicator Lights
If you are using a single Fathom v2, confirm that its "Input Mode" indicator light is on the "Master" position. If not, you will need to access the upper "Input Mode" switch on the rear panel of the Fathom v2.
If you are using multiple Fathom v2s in a Master/Slave configuration, confirm that the unit connected directly to your receiver or preamp/processor is indicating "Master" on its "Input Mode" lights and that all other units are indicating "Slave" on their "Input Mode" lights. If not, you will need to access the upper "Input Mode" switches on the rear panels of the Fathom v2s.
4. "Level Mode" Switch
Flip the master Fathom v2's "Level Mode" switch to the "REF" position.
5. "LP Filter" Switch
If your home theater receiver/processor is handling bass management (speakers set on "small") or if you are using an outboard crossover/bassmanagement processor, flip the master Fathom v2's "LP Filter" switch to "OFF." If not, select the "12 dB" position.
6. "LP Freq. (Hz)" Knob
Rotate the "LP Freq." knob to the "80 Hz" position.
7. "e.l.f. trim (dB)" Knob
Rotate the "e.l.f. trim" knob to "0".
8. "Polarity" Switch
Flip the "Polarity" switch to "0".
9. "phase (deg.)" Knob
Rotate the "phase" knob to "0" degrees
10. D.A.R.O. Defeat Switch
Press the D.A.R.O. defeat switch so that the red light in the switch remains lit.
RECOMMENDED SETUP PROCEDURES (continued)
Subwoofer System Setup:
Once you have set the controls on your home theater receiver or preamp/ processor and on your Fathom v2(s) to the settings recommended on pages 26 and 27, you are ready to begin setting up your Fathom v2 for optimum performance.
1. Level Setting
Using familiar music or movie material with deep bass content, adjust the subwoofer level to blend with the other speakers using your receiver or preamp/processor's subwoofer level control. This method is more immune to tampering than using the Fathom v2's "Master Level" knob (think toddlers or curious visitors).
In the unlikely event that the subwoofer level control in your receiver or preamp/processor cannot be turned up enough to level match the Fathom v2, return that control to "0". Then, flip the Fathom v2's "Level Mode" switch to "Variable" and with "0" as your reference point (REF mode gain and Variable "0" gain are identical) use the "Master Level" control to level match the subwoofer with the other speakers. MAKE NOTE OF THIS SETTING FOR FUTURE USE.
For more detailed information on your Fathom v2's level setting controls, please refer to the "Level Mode" and "Master Level" sections on pages 15 - 16 of this manual.
2. Polarity and Phase Adjustment
It is often helpful to have a second person operating these controls so that you can easily hear the changes from the primary listening seat.
Listening to familiar source material (preferably music with good upper bass and midbass response), flip the "Polarity" switch from "0" to "180" and listen for differences. The correct setting will sound most natural with the best upper bass punch and articulation. If both sound similar, choose "0".
Once Polarity is set, use the same music material to audition different "Phase" control settings and choose the one that further enhances the upper and midbass response. If you can't hear a difference, set the control to "0."
3. Experiment with alternative subwoofer locations (if necessary).
If you are satisfied with the basic performance of your subwoofer you are ready to move on to the next step. If not, we recommend that you experiment with the position of your subwoofer until you are pleased with its basic performance. Experimentating with placement is KEY to a superior sounding system. Moving the subwoofer just a few feet can have a significant effect on the smoothness of the bass. For each new position, start with the polarity and phase controls at "0" and repeat the setup process beginning with Step 1.
IMPORTANT! WRITE DOWN ALL SETTINGS PERFORMED IN STEPS 1-3 FOR FUTURE REFERENCE.
IMPORTANT
IMPORTANT! MAKE SURE THE ROOM IS QUIET DURING D.A.R.O. CALIBRATION! TURN OFF ANY NOISY APPLIANCES NEAR THE LISTENING ROOM (DISHWASHERS, WASHING MACHINES, ETC.)
IT IS PARTICULARLY IMPORTANT TO TURN OFF AIR CONDITIONERS OR HEAT PUMPS DURING CALIBRATION. THESE FORCED-AIR-TYPE HVAC SYSTEMS CAN CREATE MODERATE LEVELS OF 15 - 20 HZ NOISE THAT MAY INTERFERE WITH CALIBRATION.
4. Applying Digital Automatic Room Optimization (D.A.R.O.)
You are now ready to apply the power of JL Audio's exclusive Digital Automatic Room Optimization (D.A.R.O.) system. This system will measure the response of the subwoofer at your primary listening seat and apply a powerful 18-band equalizer to tame the peaks caused by room modes, resulting in smoother, more accurate bass performance. If you are using multiple Fathom v2s in a master/slave configuration, you will only need to address the unit designated as "master" to perform D.A.R.O. calibration for the entire subwoofer system. Note that all front-panel signal processing is defeated during D.A.R.O. calibration, regardless of the knob settings. Normal operation is restored once calibration is complete.
a) Set the Main Power switch to the "ON" position and be sure the Fathom v2's indicator lights are switched "ON" via the "Lights" switch.
b) Remove the calibration microphone from its protective pouch and connect its cable to the mini-XLR jack on the Fathom v2's front control panel.
NOTE: D.A.R.O. Calibration is only possible when the included JL Audio test microphone is plugged in to the Fathom v2 front panel. The "Calibrate" feature is disabled with no microphone plugged in to prevent accidental loss of settings.
c) Connect the microphone to the other end of the mic cable and temporarily place the mic in the primary listening seat. If you have a microphone stand, you can place the microphone at head height and position in the primary listening seat.
d) On the Fathom v2's control panel, press the "Calibrate" button. The green light on the "Calibrate" button will flash slowly, indicating that calibration will begin in 5 seconds.
e) Within 5 seconds of pressing the "Calibrate" button, return to your primary listening seat and hold the microphone in your normal, seated head position at the approximate height of your ears.
f) A noise sequence will be played through the Fathom v2 that sounds like hashy static. The sequence will last approximately 3 minutes. During this process, the D.A.R.O. system is taking a frequency response measurement at your seat and correcting the problems it finds. The D.A.R.O. system also compensates for any before & after level differences so that your Fathom v2 will have a similar perceived loudness after the calibration process. When D.A.R.O. is finished calibrating, the "Calibrate" button will light and stay on, indicating a successful calibration.
Should you wish to run a new calibration, simply repeat the steps above.
To clear the D.A.R.O.'s settings (i.e., return them to flat) & turn off the Calibrate light, press and hold the Demo button and then press the Defeat button. Please note that you must perform this button sequence quickly. If you hold the Demo button for more than 2 seconds without touching the Defeat button, the Demo tones will start. Should this happen, simply wait for the Demo sequence to end and try again. You can perform a new calibration by following the normal procedure outlined above.
IMPORTANT! IF YOU MOVE YOUR FATHOM V2 OR PRIMARY LISTENING SEAT IN THE FUTURE, YOU WILL NEED TO RUN D.A.R.O. AGAIN. ANY PARTICULAR CALIBRATION IS UNIQUE TO THAT PARTICULAR SUBWOOFER POSITION AND LISTENING SEAT POSITION COMBINATION. SIMPLY FOLLOW THE STEPS ABOVE TO CREATE A NEW CALIBRATION CURVE.
5. Extreme Low Frequency (e.l.f.) Trim
Use the "e.l.f. trim" control to adjust the extreme low bass extension of the Fathom v2. This control allows -12dB of cut or +3dB of boost at 24 Hertz and is particularly useful when using a Fathom v2 (or two) in a small to medium sized home theater. Since smaller enclosed spaces help to boost the level of the lowest bass frequencies, smaller theaters can be overwhelmed by the strong low-bass output of the Fathom v2 subwoofer. This can create a "thick" or "bloated" character in the lower bass region. Turning down the "e.l.f. trim" knob cuts the extreme low bass level and alleviates this condition. Feel free to experiment and listen to a variety of demanding material until you find the best match for your room and your tastes.
Your Fathom v2 is now optimized for maximum bass performance at your listening seat. Congratulations!
IMPORTANT
FREQUENTLY ASKED QUESTIONS
Can I place objects on my subwoofer?
We do not recommend placing any items on the subwoofer cabinet as they may vibrate, causing undesirable noise and possible damage to the finish. Under no circumstances should any object containing liquid be placed on the Fathom v2 cabinet.
Is the Fathom v2 magnetically shielded?
Fathom v2 subwooers are not magnetically shielded. To avoid magnetic distortion with certain television types, place the Fathom v2 at least 3-4 feet (1 - 1.5m) from your screen. If you notice any discoloration in the picture, try moving the subwoofer further away until these artifacts disappear.
Will my electric bill be high if I leave the Fathom v2 in "Auto" mode?
When in "Auto" mode, the Fathom v2 amplifier is only powered up when a significant signal is detected on the inputs. When powered down, only housekeeping circuits remain on, which draw negligible amounts of power from the wall (less than 5 watts).
Should I unplug my subwoofer during a thunderstorm or extended absence?
YES. You should unplug your Fathom v2 during (or before) thunderstorms. This will prevent any possible damage from voltage spikes due to lightning. In these conditions, it's a good idea to unplug all of your audio / video components. If you are going to be away from home for several days, it is also a good idea to unplug your home theater components to prevent damage from unexpected storms or power line conditions.
CLEANING YOUR FATHOM v2
Dust your Fathom v2's subwoofer cabinet using a clean, soft microfiber cloth or feather duster. Microfiber cloths are commonly available where automotive detailing supplies are sold.
Light smudges can generally be wiped off with a clean microfiber cloth. For more stubborn smudges, polish and protect the finish using a high-quality automotive wax and a microfiber cloth, both available wherever automotive detailing supplies are sold. We recommend Meguiar's "NXT Tech Wax" and Meguiar's Microfiber Detailing cloths.
Never use a polish that contains harsh solvents or abrasives as these may permanently damage the finish. Never use furniture polish or any oil-based product on your Fathom v2. Never use solvents or aggressive cleaning agents on your Fathom v2. When in doubt, test the cleaning product on the underside of the cabinet and let it sit for several days before committing to its use on visible portions of the cabinet.
TROUBLESHOOTING
No sound from subwoofer.
- Verify that Fathom v2 is plugged in, turned "ON" & that front panel lights are "ON". If the lights do not turn on, check the circuit breaker that feeds its outlet or plug the Fathom v2 into another AC power outlet. If your AC outlet has power but the lights still do not come on, you may need to inspect/replace the Fathom v2's main power fuse. Refer to the "Main Fuse Holder" section on the next page.
- Test the subwoofer by pressing the DEMO button on the front panel - if the sub emits demo tones the subwoofer's internal circuitry is fine and an input problem is likely. Check the input cable connections at the Fathom v2 and at the receiver/ preamp/processor.
- Verify that your receiver's subwoofer settings have not changed.
- If your other speakers play, but the Fathom v2 does not, try changing the cable that connects the Fathom v2 to the system.
- If the problem persists, call your dealer or JL Audio Technical Support for assistance.
The bass level has changed.
- Make sure your level settings (on the Fathom v2 and in your receiver/preamp/processor) have not changed.
- If you are using the Fathom v2's "Master Level" knob to set the subwoofer level, confirm that the "Level Mode" switch is set to "Variable".
- erify the position of the ELF Trim knob.
Hums or other unusual noises from your Fathom v2
- See Input Mode discussion on page 20 of this manual, especially if any upstream components, cables, etc., have recently changed.
- Turn off the Fathom v2, disconnect all its input and output signal cables, turn the Fathom v2 back on. If the noise disappears, the noise is being caused elsewhere in your system.
Bass sounds "muddy" or "too heavy".
- Try decreasing the 24 Hertz level using the "e.l.f. trim" control. Muddy bass can sometimes be caused by too much low frequency output in a moderately sized room.
- Decrease the overall subwoofer level.
- Verify your receiver's subwoofer settings.
- Try a different subwoofer or main listening seat location. Changing one or the other can have a HUGE effect on how your system sounds. See the placement discussion on pages 6-10 of this manual.
TROUBLESHOOTING - continued
D.A.R.O. Calibration attempt gives blinking Calibrate light
- If the included JL Audio Microphone is not properly plugged into the front panel jack, calibration will fail and the green Calibrate light will blink fast. Calibration will ONLY proceed with the JL Audio microphone connected. Connecting any other mic will cause the calibration to fail. Cancel the blinking Calibrate light by pressing the Calibrate button again.
- If calibration fails with the JL Audio microphone properly connected, the green Calibrate light will blink slowly. Test the microphone and cable connections and try running calibration again. If calibration fails after following the steps above, the microphone or microphone cable may be bad. Contact JL Audio Home Technical Support.
Your Fathom v2 is clearly audible outside of your house.
- Revisit the "Master Level" setting on your Fathom v2(s) or your home theater receiver/preamp/processor.
- Inquire with your JL Audio dealer about noise isolation strategies.
- Move the Fathom v2 away from windows.
MAIN FUSE HOLDER
Located on the rear panel, next to the AC cord receptacle is the main fuse holder's cover. This small spring-loaded cap may be removed, allowing access to inspect or replace the main power fuse. If your AC outlet has power but the Fathom v2's lights do not come on, the main power fuse may be blown.
To Remove - Unplug the subwoofer's AC power cord. Insert a small flathead screwdriver into the cap's slot and turn counter-clockwise slowly until the fuse holder is released. Once removed, the fuse can be inspected and if necessary, replaced. Refer to the chart below for fuse values for your specific Fathom v2 model.
To Reinstall - Note that the fuse holder's body is keyed to the opening and must be aligned to fit properly. Insert the fuse holder into the opening and gently turn clockwise (about 1/8 turn) to lock in place. Pressing the cap and feeling for the spring to compress will help to locate the correct position. Reconnect the AC power cord.
If the replacement fuse blows immediately after a fuse replacement, the subwoofer's amplifier may require service. Please contact your JL Audio Authorized Retailer or Distributor.
| Fuse Ratings, 120V Models Only | ||
| Model Fuse Type Fuse Size | ||
| f110v2 (120V) | 0.25 x 1.25 | inch, fast-acting 7A, 250V |
| f112v2 (120V) | 0.25 x 1.25 | inch, fast-acting 8A, 250V |
| f113v2 (120V) | 0.25 x 1.25 | inch, fast-acting 12A, 250V |
| f212v2 (120V) | 0.25 x 1.25 | inch, fast-acting 15A, 250V |
| Fuse Ratings, 240V Models Only | ||
| Model Fuse Type Fuse Size | ||
| f110v2 (240V) | 5mm x 20mm, fast-acting | 6.3A, 250V |
| f112v2 (240V) | 5mm x 20mm, fast-acting | 6.3A, 250V |
| f113v2 (240V) | 5mm x 20mm, fast-acting | 8A, 250V |
| f212v2 (240V) | 5mm x 20mm, fast-acting | 10A, 250V |
FATHOM.v2
BOTTOM
TOP
B A C K
FRONT
SIDE WITH GRILLE
| Specifications: | f110v2 | f112v2 | f113v2 | f212v2 |
| Enclosure Type:Sealed Sealed Seal | ||||
| Driver: | Single 10-inch(nominal diameter) | Single 12-inch(nominal diameter) | Single 13.5-inch(nominal diameter) | Dual 12-inch(nominal diameter) |
| Frequency Response (anechoic): | 27-11 Hz (±1.5dB)-3 dB at 25 Hz/120 Hz10 dB at 19 Hz/155 Hz | 21-119 Hz (+1.5dB)-3 dB at 19 Hz/150 Hz10 dB at 17 Hz/167 Hz | 20-86 Hz (-1.5dB)-3 dB at 18 Hz/127 Hz-10 dB at 16 Hz/154 Hz | 20-97 Hz (+/-1.5 dB)-3 dB at 19/110 Hz-10 dB at 15/157 Hz |
| Effective Piston Area: | 60 in20.0387 m² | 84 in20.0542 m² | 10/35 in20.0683 m² | 168 in20.084 m² |
| Effective Displacement: | 160 in22.6 liters | 287 in24.7 liters | 386 in26.3 liters | 574 in29.4 liters |
| Amplifier Power: | 100 wailsRMS short term | 1800 wailsRMS short term | 3000 wailsRMS short term | 3600 wailsRMS short term |
| Dimensions:(H)x(W)x(D)Height Dimensions include feet | 15.64 x 12.92 x 17.27 in397 x 328 x 439 mm | 18.5 x 15 x 17/625 in470 x 381 x 448 mm | 19625 x 165 x 1925 in486 x 419 x 489 mm | 31.96 x 14.92 x 20.39 in812 x 379 x 518 mm |
| Net Weight: | 69 lbs31 kg | 11/1bs53 kg | 133 lbs60 kg | 224 lbs102 kg |
| Cabinet Finish: | High-Gloss Black | High-Gloss Black | High-Gloss Black | High-Gloss Black |
FEATURES
Unbalanced Inputs:
Stereo or Mono (two RCA jacks)
Balanced Inputs:
Stereo or Mono (two female XLR jacks)
Output To Slave:
Balanced (one male XLR jack)
Input Modes:
Master or Slave
Level Modes:
Reference (fixed gain) or Variable from full mute to +15dB over reference gain
Power Modes:
Off, On or Automatic Signal-Sensing
Light Modes:
Off, On or Dim
Low Pass Filter Mode:
Off, 12 dB per octave or 24 dB per octave
Low Pass Filter Cutoff Frequency:
Variable from 30Hz - 130Hz
Polarity:
0 or 180 degrees
Phase:
Variable from 0 - 270 degrees
E.L.F. Trim:
Variable from -12dB to +3dB at 24Hz
Digital Automatic Room Optimization (D.A.R.O.)
Automatic, 18-band digital equalizer with included laboratory-grade calibration microphone, defeatable.
JL AUDIO.
- Interruption"Lights"
- Interruption "Level Mode"
- Perilla "LP freq. (Hz)"
Gire la perilla "LP freq." a la posicion "80 Hz".
- Perilla "e.l.f. trim (dB)"
Gire la perilla de ajuste de FEB ("e.l.f. trim") a "0".
- Interruption "Polarity"
- Interruptor "defeat" de DARO
Digital Automatic Room Optimization (D.A.R.O.)
- D.A.R.O. Defeat-Schalter
5. Extreme Low Frequency (e.l.f.) Trim
Digital Automatic Room Optimization (D.A.R.O.)
TECNOLOGIE JL AUDIO INCLUDE NEI SUBWOOFER FATHOM V2
Digital Automatic Room Optimization (D.A.R.O.)
5. E.L.F. (Extreme Low Frequency) Trim
Digital Automatic Room Optimization (D.A.R.O.)