Power T2D415 - Subwoofer Rockford Fosgate - Free user manual and instructions

Product type	Subwoofer
Brand	Rockford Fosgate
Model	Power T2D415
Speaker diameter	15 inches (38 cm)
Nominal impedance	Dual 4-ohm voice coils (wirable as 2 ohms or 8 ohms)
RMS power	800 watts
Peak power	1600 watts
Frequency response	20 – 250 Hz
Recommended enclosure type	Sealed or ported
Recommended enclosure volume (sealed)	71 liters
Recommended enclosure volume (ported)	99 liters
Power supply	Passive (requires external amplifier)
Main functions	Reproduction of low frequencies; compatible with sealed and ported enclosures
Maintenance and cleaning	Clean with a soft, dry cloth
Safety	Disconnect the battery before installation; avoid prolonged listening above 100 dB
Spare parts and repairability	Voice coil replaceable by a professional
General information	Subwoofer for car audio system; detailed manual available for download

Frequently Asked Questions - Power T2D415 Rockford Fosgate

How do I wire my Power T2D415 subwoofer ?

Wiring can be done in series, parallel, or series-parallel to match the impedance to your amplifier. Refer to the diagrams in the manual to choose the appropriate configuration.

What type of enclosure should I choose, sealed or ported ?

Sealed enclosures offer linear response and good sound quality, while ported enclosures provide higher efficiency and deeper bass. The choice depends on your preferences.

What enclosure volume is recommended for this subwoofer ?

For a sealed enclosure, an internal volume of 71 liters is recommended. For a ported enclosure, a volume of 99 liters is advised. Adjust according to specifications.

What amplifier power should I use with the Power T2D415 ?

An amplifier delivering 800 watts RMS at the chosen load impedance (2 or 8 ohms) is ideal. Be careful not to exceed the peak power of 1600 watts.

How do I wire in series or parallel ?

In series, the coils are connected end-to-end (increases impedance). In parallel, they are connected to common terminals (decreases impedance). The series-parallel combination allows obtaining an intermediate load.

How do I install the subwoofer in a vehicle ?

Disconnect the battery before any work. Securely mount the enclosure in the trunk or cabin. Use an appropriately sized power cable and connect the amplifier to the battery via a fuse.

What are the risks of prolonged listening at high volume ?

Continuous exposure above 100 dB can cause permanent hearing loss. Subwoofers can produce over 130 dB. Practice moderate listening.

How do I maintain my subwoofer ?

Clean the surface with a soft, dry cloth. Avoid liquids. Regularly check connections and enclosure seal.

Can I use a passive crossover ?

It is recommended to use an active low-pass filter at 80-100 Hz (12 dB/octave) for optimal performance. Passive filters (coils) can be used but are less precise.

Where can I find precise dimensions to build an enclosure ?

Mounting dimensions (diameter, depth) are given in the complete manual downloadable from notice-facile.com. Use MDF at least 18 mm thick.

USER MANUAL Power T2D415 Rockford Fosgate

T2-DVC - DUAL VOICE COIL SUBWOOFERS

12"15"

SAFETY

RECOMMENDED ENCLOSURES

WARNING

This symbol with "WARNING" is intended to alert the user to the presence of important instructions. Failure to heed the instructions will result in severe injury or death.

CAUTION

This symbol with "CAUTION" is intended to alert the user to the presence of important instructions. Failure to heed the instructions can result in injury or unit damage.

A

CAUTION To prevent injury and damage to the unit, please

read and follow the instructions in this manual. We want you to enjoy this system, not get a headache.

#

CAUTION If you feel unsure about installing this system

yourself, have it installed by a qualified Rockford Fosgate technician.

#

CAUTION Before installation, disconnect the battery negative

(-) terminal to prevent damage to the unit, fire adn/or possible injury.

PRACTICE SAFE SOUND

Continuous exposure to sound pressure levels over 100dB may cause permanent hearing loss. High powered auto sound systems may produce sound pressure levels well over 130dB. Use common sense and practice safe sound.

DESIGN FEATURES

These woofers were designed for use primarily in small ported enclosures. By utilizing the latest materials and construction techniques, we are able to offer a speaker with high output at low frequencies while requiring a minimum of operating space.

CARTON CONTENTS

(1) Power DVC Subwoofer
(1) Trim ring
(4) Socket head trim ring screws
(8) Socket head wood screws
(1) Socket head driver bit
(1) Installation & operation manual

VENTED ENCLOSURES

Vented enclosures vary only from the sealed enclosure in that a vent or port is added to "tune" the enclosure. The enclosures recommended are designed for great overall performance. Larger boxes tend to be easy to tune to lower frequencies while medium and small boxes are easier to tune to higher frequencies. The vented design is less linear in response than the sealed box but with noticeably more output at the tuning frequency.

Advantages of vented enclosures:

Higher average output than sealed
- Tuning frequency can be easily adjusted by changing port length
- Deep bass response with lower power requirements
- Great for high output with limited power

BUILDING AN ENCLOSURE

To work properly, the walls of the enclosure must be rigid and not flex when subjected to the high pressures generated by the speaker's operation. For optimum performance, we recommend using 3/4'' MDF (Medium Density Fiberboard) and internal bracing. The enclosure should be glued together and secured with nails or screws.

CALCULATING VOLUME

Calculating volume is merely a matter of measuring the dimensions in inches and using the formula: H × W × D divided by 1728 (cubic feet). See block below.

Box Volume Height "x Width" x Depth" Divided by (cubic feet) 1728

If two facing sides are of uneven length, add them together and divide by two to take the average. Using this number will give you the volume without the necessity of calculating the box in sections and adding the sections together. The thickness of the baffle material reduces the internal volume so this must be subtracted from the outside dimensions to determine the internal volume. The speaker itself also reduces the internal volume. The amount of air displaced by each model is listed on the specification sheet and should also be subtracted from the gross volume calculation.

NOTE: Vb is the gross volume, which is the TOTAL internal volume, before any speaker and/or port displacement. All external dimensions were based on the use of 3/4'' (1.90cm) materials.
NOTE: When using enclosures other than recommended, call Technical Support for correct application.

Optimum Enclosure Sizes

VENTED ENCLOSURES 12" 15"
	T2D212 / T2D412	T2D215 / T2D415
Vb- Internal Area cu. ft. 2.0(Liter)	2.75(56.63)	(77.87)
Fb- Tuning Frequency (Hz)	40.0	36.0
F3- -3dB Point (Hz)	32.0	29.0
H - Height-inch(cm)	16.5	17.5(44.45)(41.91)
W - Width-inch(cm)	25.5	27.5(69.85)(64.77)
D - Depth-inch(cm)	12.5	15.25(38.74)(31.75)
P - Port Diameter andLength-inch(cm)	(3) 3 x 14(3) (7.62 x 35.56)	(1) 6 x 17(1) (15.24 x 43.18)
SEATED ENCLOSURES 12" 15"
	T2D212 / T2D412	T2D215 / T2D415
Vb- Internal Area cu. ft.(Liter)	1.0(28.32)	2.0(56.63)

Number of ports noted in ()
Specifications subject to change without notice
NOTE: The port shown can be placed on any face of the enclosure as long as the port ends are not obstructed.
NOTE: When using vented enclosures, for maximum reliability and power handling ensure that a subsonic or "infrasonic" filter is used so that only usable low frequency signal is sent to the subwoofer.

" HIGH OUTPUT" SLOT LOADED ENCLOSURES

D

VENTED ENCLOSURES 12" 15"
	T2D212 / T2D412 T2D215 / T2D415
\( V_b \) - Box Volume Net / Gross - cu. ft.(Liter)	2.25 / 3.12(63.71 / 88.35)	3.25 / 4.22(92.03 / 119.50)
\( F_b \) - Tuning Frequency (Hz)	40.0	38.0
A - Width-inch(cm)	30.0	30.0(76.20)(76.20)
B - Height-inch(cm)	15.25	18.0(45.72)(38.74)
C - Depth-inch(cm)	15.25	17.0(43.18)(38.74)
D - Port area andLength-inch(cm)	(1) 3 x 13.75 x 25.75(1) 7.62 x 34.93 x 65.41	(1) 3 x 16.5 x 22.5(1) 7.62 x 41.91 x 57.15)
E - Length-inch(cm)	14.25	9.25(23.50)(36.20)
F - Mounting Diameter-inch(cm)	10-13/16	13-13/16(35.08)(27.46)
Cut List
Baffle / Back-inch(cm)	30 x 15.25(76.20 x 38.74)	30 x 18(76.20 x 45.72)
Top / Bottom-inch(cm)	30 x 13.75(76.20 x 34.93)	30 x 15.5(76.20 x 39.37)
Ends -inch(cm)	13.75 x13.75(34.93 x 34.93)	15.5 x 16.5(39.37 x 41.91)
Port -inch(cm)	13.75 x 13.5 - 13.75 x10.75(34.93 x 34.29 - 34.93 x 27.31)	8.5 x 16.5 - 12.5 x 16.5(21.59 x 41.91 - 31.75 x 41.91)

Number of ports noted in ()
Specifications subject to change without notice

Specifications subject to change without notice

	T2D212 / T2D412 T2D215 / T2D415	"51"21 POWER T2-DV
A - Trim Ring Diameter-inch	12.76	15.74(39.98)(32.42))mc(
B - Trim Ring Height-inch)mc(	1.75(4.44)	1.85(4.70)
C - Mounting Diameter-inch	10-13/16)mc(	13-13/16(35.08)(27.46)
D - Mounting Depth-inch	9)mc(	10(25.40)(22.86)
E - Overall Diameter-inch(cm)	12.30(31.24)	15.28(38.80)
F - Screw Hole Diameter-inch	11.74)mc(	14.72(37.38)(29.82)
G - Speaker Displacement - cu. ft.(Liter)	0.151(4.28)	0.176(4.98)

WIRING CONFIGURATIONS

By varying the wiring configuration of your speakers you can create an impedance load to match your system. Altering the wiring configurations gives a range of options for impedance loads. Series, Parallel, or Series-Parallel wiring configurations are different techniques for wiring speakers that provide different loads. Series configuration is a string method where speakers are wired end to end. Parallel configuration uses two or more speakers wired across common terminals. Series-Parallel configuration combines both techniques. Choose the wiring diagram that corresponds to the number of woofers and the impedance of your amplifier.

SUBWOOFER CROSSOVERS

There are two operational types of crossovers, passive and active. Passive crossovers (coils or inductors) are placed on the speaker leads between the amplifier and speaker. An active crossover is an electronic filter that separates the audio signal fed to different amplifiers. For optimum subwoofer performance, we recommend using an active 80-100Hz low-pass crossover at 12dB/octave.

(1) 4 ohm DVC Speaker =2 ohm Load

(2) 4 ohm DVC Speaker = 1 ohm Load

(1) 2 ohm DVC Speaker = 4 ohm Load

(2) 2 ohm DVC Speaker = 2 ohm Load

(2) 4 ohm DVC Speaker = 4 ohm Load

(3) 4 ohm DVC Speaker = 2.67 ohm Load

(4) 4 ohm DVC Speaker = 2 ohm Load

(4) 2 ohm DVC Speaker = 4 ohm Load

SPECIFICATIONS

Model - Power DVC T2D2I2 T2D4I2 T2D2I5 T2D4I5
Nominal Impedance (ohms)	2Ω (2)	4Ω (2)	2Ω (2)	4Ω (2)
Voice Coil Diameter-inch (mm)	4 (101.6)	4 (101.6)	4 (101.6)	4 (101.6)
FS (Hz)	39	40	31	31
QTS	0.49	0.59	0.52	0.62
VAS-cu.ft. (liter)	0.48 (13.6)	0.48 (13.6)	1.71 (48.4)	1.82 (51.6)
Xmax-inch (mm)	0.75 (19)	0.75 (19)	0.75 (19)	0.75 (19)
SPL (dB @ 1w/1m)	83.5	83.1	86.0	85.4
Power Handling (RMS)	1200	1200	1200	1200
Power Handling (Max)	2400	2400	2400	2400
Mounting Dia.-inch (mm)	10-13/16 (274.64)	10-13/16 (274.64)	13-13/16 (350.84)	13-13/16 (350.84)
Mounting Depth-inch (mm)	9 (228.60)	9 (228.60)	10 (254.00)	10 (254.00)
Speaker Dis.-cu. ft. (liter)	0.151 (4.28)	0.151 (4.28)	0.176 (4.98)	0.176 (4.98)
Sealed BoxVol.-cu. ft. (liter)	1.0 (28.32)	1.0 (28.32)	2.0 (56.63)	2.0 (56.63)
Vented BoxVol.-cu. ft. (liter)	2.0 (56.63)	2.0 (56.63)	2.75 (77.75)	2.75 (77.75)
Port Diameter & Length (in.)	(3) 3 x 14	(3) 3 x 14	(1) 6 x 17	(1) 6 x 17
Port Diameter & Length (cm)	(3) 7.62 x 35.56	(3) 7.62 x 35.56	(1) 15.24 x 43.18	(1) 15.24 x 43.18

Français

• Hard anodized aluminum dust cap.
• Hard anodized aluminum cone.
• Tear & fatigue resistant poly-cotton spider.
  High density Santoprene surround.
• Ultra-High temp aluminum voice coil with spun-laced Nomex™ insulating reinforcement collar.
• Optimized motor magnetics with extended vented pole and bumped backplate.
• Triple stack ferrite magnet structure.
• Fatigue resistant and reduced strain "stitched on" flexible lead wire design.
• Multi-point high-temp/high-strength neck joint bonding technique.
  Rigid die-cast aluminum frame.
  Die-cast motor case / heat sink.
• Custom insulated/isolated compression input terminal assembly.
• Proprietary spider venting/cooling technique.
• IDHS™ Inductive Damping Heat Sink.
• Removable and reversible screw concealing ring.