R680N - Car stereo Rodek - Free user manual and instructions

Product Type	6-Channel Car Audio Power Amplifier
Brand	Rodek
Model	R680N
Dimensions (W x H x D)	535 x 56 x 229 mm
Weight	Approx. 3.5 kg
Power Supply	12V DC (car battery)
Rated Power Output (RMS) @ 4 Ohms	6 x 80W
Rated Power Output (RMS) @ 2 Ohms	6 x 140W
Bridged Power Output (RMS) @ 4 Ohms	4 x 80W + 1 x 250W (CH5/6 bridged)
Frequency Response	10 Hz - 40 kHz
Signal-to-Noise Ratio	>85 dB
Input Sensitivity	0.2V - 9V
Crossover Type	Electronic, 12 dB/octave
Crossover Frequency Range (Highpass)	10 - 400 Hz
Crossover Frequency Range (Lowpass)	40 - 400 Hz
Phase Shift	0 - 180°, variable
Fuses	4 x 30A
Cooling	Internal fan
Mounting Clearance	At least 5 cm on all sides
Minimum Impedance (Stereo)	2 Ohms
Minimum Impedance (Bridged)	4 Ohms
Warranty	2 years
Care and Cleaning	Wipe with a dry, soft cloth. Do not use solvents.
Spare Parts / Repairability	Contact authorized service center.

Frequently Asked Questions - R680N Rodek

What is the recommended power cable size for the R680N?

Use a power cable with at least 35 mm² cross-section and a 80A fuse within 30 cm of the battery.

Can I bridge channels CH5 and CH6 for a subwoofer?

Yes, channels CH5 and CH6 can be bridged into a 4 Ohm load to deliver up to 250W RMS.

How do I set the crossover for component speakers?

Set the operation mode to HP (Highpass) and adjust the frequency according to the speaker size: e.g., 60-90 Hz for 16 cm systems.

What does the protection LED indicate?

A red LED indicates protection mode due to overheating, short circuit, or malfunction. Check wiring and cooling.

What is the minimum impedance load for bridged operation?

The minimum impedance for bridged operation is 4 Ohms.

How do I adjust the phase shift for subwoofers?

Activate the phase shift switch for CH5/6 and rotate the control from 0-180° while listening from the driver's seat to achieve coherent bass.

Can I use this amplifier with a factory head unit?

Yes, the input sensitivity is adjustable from 0.2V to 9V, allowing compatibility with most head units. Use high-quality RCA adapters if needed.

What is the typical power consumption?

At full output, it can draw up to 120A (4 x 30A fuses). Actual consumption depends on load and music content.

How should I ground the amplifier?

Connect the GND terminal to a clean chassis ground point as close as possible to the amplifier, using the same gauge cable as the +12V supply.

Does the R680N have a remote turn-on?

Yes, connect the REM terminal to the head unit's remote output to automatically turn the amplifier on/off.

USER MANUAL R680N Rodek

RoDEK INSTALLATION GUIDE e YEARS WARRANTY RoDEK POWER AMPLIFIER RG80N 6-Channel

INHALTSVERZEICHNIS

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and thank you for choosing the RODEK R680N 6-channel car audio power amplifier!

To maximize the performance of your complete car audio system, it is recommended that you acquaint yourself thoroughly with the capabilities and features of this amplifier. Therefore read this manual carefully, before attempting the installation of this multichannel amplifier and retain the manual and your purchasing/installation receipts for future reference.

1. TECHNICAL FEATURES

R680N

■ DOUBLE MOS-FET POWER SUPPLY FOR HIGH POWER OUTPUT AND LOAD STABILITY
■ INTERNAL FAN COOLING FOR IMPROVED THERMAL MANAGEMENT AND POWER HEADROOM
■ NEW HEATSINK STRUCTURE WITH BLUE LOGO ILLUMINATION
■ ELECTRONIC CROSSOVERS WITH INDEPENDENTLY SELECTABLE OPERATION MODE: HIGHPASS, LOWPASS AND BANDPASS
■ FULLY VARIABLE CROSSOVER FREQUENCY, 10HZ – 400HZ FOR HIGHPASS, 40HZ – 400HZ FOR LOWPASS, OR HP/LP CASCADED FOR BANDPASS OPERATION
■ PHASE SHIFT CONTROL, FULLY VARIABLE IN BETWEEN 0-180°
■ MOULDED POWER INPUT AND SPEAKER OUTPUT TERMINALS

2. INPUTS · OUTPUTS · CONTROLS

1. RCA inputs (CH1/2, CH3/4, CH5/6, left and right channels). Line inputs for connection with RCA line-out's of the head-unit
2. Input gain control, LEVEL adjustment for channels CH1/2. Used to match the RCA line output voltage of the head-unit to the amplifier input section
3. Operation mode selector, slide switch to select highpass or fullrange operation of the active crossover for channels CH1/2
4. Highpass crossover frequency control, to adjust the cut-in frequency of the channels CH1/2
5. Input gain control, LEVEL adjustment for channels CH3/4. Used to match the RCA line output voltage of the head-unit to the amplifier input section
6. Operation mode selector, slide switch to select highpass, bandpass or fullrange operation of the active crossover for channels CH3/4
7. Highpass crossover frequency control, to adjust the cut-in frequency of the channels CH3/4
8. Lowpass crossover frequency control, to adjust the cut-off frequency of the channels CH3/4
9. Input gain control, LEVEL adjustment for channels CH5/6. Used to match the RCA line output voltage of the head-unit to the amplifier input section

10. Operation mode selector, slide switch to select highpass, bandpass or fullrange operation of the active crossover for channels CH5/6

11. Highpass crossover frequency control, to adjust the cut-in frequency of the channels CH5/6

12. Lowpass crossover frequency control, to adjust the cut-off frequency of the channels CH5/6
13. Slide switch to activate/deactivate the phase-shift control feature of channels 5/6
14. Phase-shift control, to alter the acoustical phase of the out-put signal from 0 - 180°
15. Operation LED, is lit blue when power is on
16. Protection LED, is lit red when the amplifier is in protection mode because of malfunction, overheating or short-cut on speaker cable leads
17. Terminal block for the speaker wire connection
18. Fuses
19. "+12V" for connection to the positive terminal of car battery
20. "GND" for connection to chassis ground or negative terminal of car battery

21. "REM" for the automatic (remote) turn-on / turn-off of the power amplifier from the head-unit's remote or antenna control lead

22. INPUTS · OUTPUTS · CONTROLS
    

8 7 6 5 4 3 R680N 2 CH3/4 CH1/2 LOW PASS HIGH PASS BP LEVEL HIGH PASS LEVEL 40Hz 400HZ 10Hz 400HZ HP FULL 9V 0.2V 10Hz 400HZ HP FULL 9V 0.2V PHASE PHASE LOW PASS HIGH PASS BP LEVEL OFF ON 40Hz 400HZ 10Hz 400HZ HP FULL 9V 0.2V PROTECT POWER 16 15 14 13 12 11 10 9 FRONT PANEL R680N CH6 CH4 CH2 CH5 CH3 CH1 1

FRONT PANEL R680N

REAR PANEL R680N R680N REM GND +12V FUSE FUSE FUSE FUSE CH5 BRIDGED CH1 CH2 CH5 CH5 BRIDGED CH3 CH4 CH6 19 18 17 21 20

3. mOUNTING OF THE AmPLIFIER

Before you attempt the installation of your R680N 6-channel amplifier, it is recommended to map out the complete audio system and the respective wiring required. Please note that - because of possible interference problems with the existing car electrics and electronics - especially the routing of the signal cables and the chassis ground connection will have a profound impact on the performance of the overall system. Secondly, the correct mounting location needs your attention too (proper cooling of the amp!). Use only quality installation material and if you have only little or no experience with complex car audio installations, we strongly recommend you to consult your nearest authorized RODEK dealer/installer.

3.1 MOUNTING LOCATION

The mounting location should be carefully selected, preferably in the trunk compartment of your car! In the interest of passive driver and passenger safety, the amplifier must be securely mounted, and special precautions must be taken to allow sufficient cooling. The amp can get quite hot during operation, so a clearance of at least 5cm from both sides and from the top of the amp must be considered.

Furthermore, this amplifier features an internal fan, so the side panels must not be covered to allow for a good air flow in and out of the side-panel windows.

Make sure there is no wiring harness, fuel tank etc. behind or below the mounting surface that may be damaged by the drilling of the holes for the amplifier mounting screws. The above mentioned clearance of at least 5cm to all sides of the amplifier is not only for proper cooling, but also because the crossover controls must remain accessible.

The amplifier must NOT be mounted directly to the chassis ground of the vehicle, this may cause ground loops resulting in loud hum noise.

3.2 MINIMUM IMPEDANCE LOAD

The output stages of the RODEK R680N multichannel amplifier are designed to give you extraordinary output power into 4 or 2 Ohms loads in normal stereo configurations. In bridged mode, the minimum impedance load is 4 ohms. The amplifier might suffer from thermal shut-down or even damage, if these recommended minimum impedance load ratings are not considered appropriately.

4. ELECTRICAL wIRING

4. ELECTRICAL WIRING

IMPORTANT! Disconnect the positive battery terminal (+12V) or remove the main fuse near the car battery before you start any wiring work! The power supply of the car audio system must be disconnected until the entire wiring installation is completed.

Use rubber grommets when running cables through any metal or sharp plastic panels, to prevent accidental shorting or shearing. Make sure the cables do not interfere with normal operation of the vehicle.

Especially the music signal cables (RCA interconnects) should be kept far away from any potential sources of electrical interference e.g. electronic vehicle management systems (engine computers, relays etc.) fuel pumps, wiring harnesses etc.!

4.1 RCA INTERCONNECTS / REMOTE LEAD

Carefully run the RCA audio signal interconnect(s) and the remote switching cable from the head-unit to the amplifier. The audio signal cables should be routed completely separate from the power cables. Use only double or triple shielded quality cables!

Connect the remote wire lead to the remote output of the head-unit and to the remote input terminal of the amplifier. Finally, connect the RCA interconnect cable(s) to the respective outputs on the head-unit and the RCA inputs of the amplifier.

4.2 LOUDSPEAKER CABLES

Connect the loudspeaker wires to the speaker terminals of the amplifier. Use good quality wires of 2.5mm^2 cross-section. When baring wires, remove approximately 6-8mm of the insulation and after axially twisting the wires; insert the bare ends into the corresponding speaker terminal output on the amplifier. Be sure to follow correct polarity ("+" to "+"; "-" to "-"). Tighten the terminal screws on the amplifier.

4.3 CONNECTION OF POWER CABLES

Run the positive power cable ("+12 V") directly from the positive terminal of the car battery to the amplifier. Make sure the power cable makes good contact to the battery; i.e. use an appropriate battery clamp that accepts big gauge power cables! For protection of your car audio system and your entire car against electrical fire hazards from a short-circuit of the main power cable with chassis ground, you must insert a main fuse (holder) within the first 30cm of the battery. The fuse type/value should be matching the limitations of your main power cable and the requirements of your car audio system. For example 80 A fuse when using 35mm² power cable.

Now you route the ground cable to the amplifier. It is best to keep the ground cable ("-12V") as short as possible, i.e. to find a chassis contact very close to the amplifier. The ground power cable must have the same cross-section as the positive power cable. It is recommended to use a corrosion-resistant gold-plated power ring or a massive ground clamp between the ground cable and the chassis ground point. Keep in mind that audible interferences and problems originating in the power supply of the amplifier, are mostly based on a bad ground contact. So a good (and clean) grounding to the vehicle chassis is absolutely crucial, to obtain best performance of your amplifier.

5. CROSSOVER SETTINGS

The R680N is multi-channel concept amplifier with integrated active crossovers and thus, offers different amplification modes which can be set by the operation mode slide switches. Three of these switches can be found on the R680N amp. These switches enable you to configure each stereo channel pair to work in either in fullrange, highpass or even bandpass mode. Therefore - before you get started with the settings of crossover frequencies and input gain adjustments - you must select the appropriate operation mode for each channel pair of your RODEK amplifier, depending on the speaker system that is connected and driven by the amp. This will make sure that every speaker system is only working in its proper frequency operation range, for which the speaker was designed. For example select HIGHPASS, if the speaker is a component- or coaxial type, or BANDPASS in case of a kickbass or subwoofer system - and finally FULL(range) if the passband frequency of the stereo channel is already controlled by a head-unit with an integrated DSP based active crossover.

5.3.1 HIGHPASS FOR COMPONENT AND COAXIAL SPEAKERS

Before you start your adjustments, all tone controls (i.e. Bass, Treble), fader/balance and loudness featured on the head unit, must be set to their respective neutral or center position. Please take a look at the chart below, featuring the suggested high-pass cross-over frequency settings for coaxial- and component speaker systems - and adjust the highpass control of each channel pair that drives satellites speaker systems accordingly. The most important factor for the individual adjustment of the highpass crossover frequency is the reproduction of mid-bass frequencies and the resulting power-handling of the speaker system. This setting is always a compromise. Try to find a highpass crossover point, that will suit your personal listening preferences and - at the same time - also considers the physical (cone excursion) capabilities of your speakers best.

Satellite speaker system, front door mounted, recommended highpass frequency

10 cm Coaxial- or Component System 90 - 120 Hz 13 cm Coaxial- or Component System 80 - 100 Hz 16 cm Coaxial- or Component System 60 - 90 Hz

Satellite speaker system, rear mounted, recommended highpass frequency

10 cm Coaxial- or Component System 100 - 150 Hz 13 cm Coaxial- or Component System 120 - 150 Hz 16 cm Coaxial- or Component System 130 - 150 Hz

5. CROSSOVER SETTINGS

5.3.2 BANDPASS FOR KICKBASS SYSTEMS

If you intend to operate a kickbass loudspeaker system in the front doors of your vehicle, you must select two crossover frequencies at the active crossover of your RODEK amplifier. The operation mode of the channel pair driving the kickbass speaker system must be set to BP (bandpass). The bandpass filter contains a highpass (10 - 400Hz) with a cascaded lowpass (40 - 400Hz) filter. The lowpass crossover point is usually set at a frequency that equals at least twice the value of the highpass crossover frequency setting. The lowpass filter frequency is mostly set a little lower, than the highpass crossover frequency of the satellite channels.

Kickbass speaker system, front door mounted, recommended bandpass frequencies

16 cm Kickbass Speaker System 80 - 110 Hz Highpass 200 - 250 Hz Lowpass

5.3.3 BANDPASS FOR SUBWOOFER SYSTEMS

To drive a subwoofer system, the integrated electronic crossover of the channels CH5/6 must also operate in bandpass mode. Before you attempt to adjust the lowpass crossover frequency, you must first turn the (subsonic)highpass frequency control counterclockwise to its lowest position at 10 Hz.

Now you can set an appropriate lowpass crossover frequency. For this purpose, open the input gain control - the arrow of the knob should point to "noon" - so you can hear the subwoofer playing. Ideally, the low-pass cut-off frequency should be set between 50 to 90 Hz - and this setting has to be entirely determined by ear. Try to find lowpass crossover frequency setting, that gives you a "full-bodied" bass reproduction with enough impact in the upper bass range.

Note: If the lowpass crossover frequency is set too low, the sound will have a tendency to sound extremely soft and low-end heavy!

Adjust the subsonic-highpass, if you wish to squeeze out the most (max-dB) of your subwoofer system. Turn the highpass frequency control up, to a point where you can hear that the bass reproduction starts to get "thinner". The subsonic highpass frequency should be set to a value between 20 to maximum 50 Hz.

5. CROSSOVER SETTINGS

5.4 ADJUSTING INPUT SENSITIVITY

To reach a maximum noise-free dynamic headroom from each individual head unit/amplifier/speaker combination, it is important to set the respective input gain controls correctly. The input level settings determine the actual signal-to-noise ratio, and they are also responsible for obtaining the maximum distortion-free SPL (sound pressure level) from your specific setup.

Turn-on your head-unit and set the volume control to approximately 3/4 of full volume, while playing a dynamic track from a CD. Slowly increase the LEVEL adjustment control of the channel pair to which your subwoofer system is connected to. Turn up the (sub channel) level control knob until you can just about hear distorted bass sounds. Now you reduce the volume level of your head unit to a "normal" listening level and "add" all the remaining channel pairs, by turning up the corresponding level controls - aiming for a balanced sound with a slight emphasis in the bass range. All remaining channels, no matter if this concerns rear mounted coaxials, component- or kickbass systems installed in the front doors - must be balanced against the main level setting of your subwoofer.

5.5 ADJUSTMENT OF PHASE SHIFT CONTROL

The phase shift function of channels CH5/6 can be activated with the corresponding slide switch. The phase-shift control enables you to match the acoustical phase relations of subwoofer and the speaker system playing in the front doors, either a component or a kickbass system. The target is that both speaker systems, normally separated by aprox. 3m of distance are intended to play acoustically "in-phase" at the drivers seat location. A good match of the acoustical phase between subwoofer and the system in the front doors will give you the impression of bass sounds coming from a place in front of you. Or the other way round, the subwoofer playing in the trunk of your car can not be localized that easily.

The second advantage is, that the upper bass region - i.e. where the sound waves radiated by the subwoofer and the kickbass or front door mounted component system are crossing over - will sound considerably more precise and tight. This phase adjustment can only be determined by ear, there is no rule of thumb to find a good match, and you will definitely need somebody to help you. To judge the effect of the phase-shift adjustment, you must sit in the drivers seat, and somebody must adjust the phase shift control knob until the sound reproduction in the bass region is best. Furthermore, it might be necessary to invert the (connection) polarity of your subwoofer - and re-adjust the phase, if you can not find a proper match with the correct polarity subwoofer in-phase connection.

6. TECHNICAL SPECIFICATIONS R680N

Rated Power Output (RMS)

All channels driven simultaneously

@ 13.8 V into 4 Ohms (THD<1%) 6 x 80W

Rated Power Output (RMS)

All channels driven simultaneously

@ 13.8 V into 2 Ohms (THD<1%) 6 x 140W

Rated Power Output (RMS)

All channels driven simultaneously

@ 13.8 V into 4 Ohms (THD<1%) 4 x 80W + 1 x 250W CH5/6 bridged into 4 Ohms

Damping Factor @ 4 Ohms Load

All Channels > 200

Signal-to-Noise Ratio (A-Filter Weighted)

All Channels @full rated power output >85dB

Frequency Response (-3dB)

Operation Mode set to FULL,

All Channels driven simultaneously 10Hz - 40kHz

Channel Separation

All Channels > 50 dB

Input Sensitivity

All channel Pairs 0.2V - 9V

Integrated Cross-Over/Filtering

Slope Rates 12 dB/Octave High-&Lowpass

Highpass Cross-Over Frequency Range continuously variable 10 - 400 Hz

Lowpass Cross-Over Frequency Range continuously variable 40 - 400 Hz

Fuses 4 x 30 A

Dimensions (W x H x D) 535 x 56 x 229 mm

7. wARRANTY

Thank you for purchasing this RODEK R680N amplifier. It is advisable to keep the original packing material for future transporting of the product. Please read the warranty specifications below carefully.

Should your RODEK product require warranty service, please return it to the retailer from whom it was purchased, or the distributor in your country. Please do not send any product to RODEK Inc. U.S.A. Should you have difficulty in finding an authorized RODEK service center, details are available from your local distributor.

The RODEK R680N amplifier is fully warranted against defective materials or workmanship for a period of TWO YEARS from date of purchase at retail. Warranty work will not be carried out unless this warranty certificate is presented fully completed with serial number, purchaser's address, purchasing date and dealer stamp together with the original sales slip!

WARRANTY LIMITATIONS

This warranty does not cover any damage due to:

1. Improper installation, incorrect audio or mains connection(s).
2. Exposure to excessive humidity, fluids, sun rays or excessive dirt or dust.
3. Accidents or abuse
4. Unauthorized repair attempts and modifications not explicitly authorized by the manufacturer.

This warranty is limited to the repair or the replacement of the defective product at the manufacturer's option and does not include any other form of damage, whether incidental, consequential or otherwise. The warranty does not cover any transport costs or damages caused by transport or shipment of the product.

Date of purchase: ____

Your name:

Your address:

City:

State: ZIP or Postal Code:

Country:

Your phone number: ____

e13 033475

Dealer's address & stamp

Exclusive distributor for Europe and Asia