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Rockford Fosgate Power T2D415

1200W 15" Power T2 Series Dual 4 ohm Subwoofer

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Too Much Power To Handle

The T2D415 Power Series 15" Subwoofer by Rockford Fosgate has a peak power rating of 2400 watts and a RMS rating of 1200 watts. With this much power you can rest assure that you will be the envy of your block, as you stroll down your street with some car rattling bass. Constructed with a hard anodized cone and dust cap for strength and durability the Power Series subs will keep going now matter how long your listening sessions last. Also equipped with Inductive Damping Heat Sink, that helps radiate heat to reduce the voice coil temperature and keeps the sub operating at a safe operating temperature when pumping out high amounts of SPL. If you are looking to take your car audio system to the next level, the T2D415 will not only overwhelm you but simply blow you away.

Aluminum Dust Cap Cone

Aluminum Dust Cap & Cone

To increase the strength, weight, and thermal capacity of the subwoofer, a hard anodized cone and dust cap has been used. A Parabolic triangular cone support is used to reduce piston flex and cone distortion. The result is excellent heat transfer, reduced distortion, higher power handling, and a better sounding subwoofer!

IDHS Inductive Damping Heat Sink

IDHS: Inductive Damping Heat Sink

By securing the Inductive Dampening Heat Sink (IDHS) to the top of the magnet structure, Rockford Fosgate is able to improve the efficiency of their drivers. This is accomplished by reducing the amount of distortion and back Electro-Magnetic Force (EMF). The IDHS also radiates heat to reduce the temperature in the voice coil.

Rockford Fosgate inverted mounting

Reverse Mounting Compatible

The removable trim ring can be installed in the front or back side of the subwoofer. This enables the subwoofer to be mounted in either direction. No matter which way you install the subwoofer, it will still look great with a cosmetically finished look. Inverted mounting of the sub shows off the large magnet structure of this giant subwoofer.

Anodized Aluminum Voice Coil Former

Anodized Aluminum Voice Coil Former

By using an anodized aluminum voice coil former on their subwoofers, Rockford Fosgate is able to dissipate heat from the voice coil more efficiently. A hot voice coil can melt the adhesive bonds, which will lead to eventual subwoofer failure. The aluminum voice coil former acts as a heat-sink to dissipate thermal build-up on the voice coil cool during high SPL conditions.

CEA-2031 Rockford Fosgate Subwoofers

Conforms to CEA-2031

Rockford Fosgate has built this subwoofer to conform to the CEA-2031 loudspeaker power handling industry standards. This means that you can trust the subwoofer to have the capacity to safely handle the continuous (RMS) power rating. Having a CEA-2031 power handling is important when matching a subwoofer to an amplifier because the power ratings are accurate.

Rockford Fosgate Stitched Tinsel Leads

Stitched Tinsel Leads

To improve the reliability and performance by reducing fatigue and possible shorting, Rockford Fosgate has stitched the tinsel leads to the spider. The multipoint periodic stitching lead wires reduce the mass of the tinsel leads to spread the stress over a greater area. This improves the reliability and performance of the subwoofer.


General Features:

  • 15" Dual 4 ohm T2 Power Series Subwoofer
  • Power Handling:
    • Peak: 2400 watts
    • RMS: 1200 watts
  • Impedance: Dual 4 ohm
  • Hard anodized aluminum dustcap and cone
  • High excursion Thermo-Rubber Santoprene surround
  • Mirror image symmetrical tear and fatigue resistant poly cotton spider
  • Parabolic triangular cone geometry support system
  • Precision cast and vented aluminum alloy basket and rigid frame
  • Optimized motor magnetics with extended vented pole and bumped backplate
  • Die-cast motor case and heatsink
  • Removable and reversible screw concealing ring
  • Ultra-high temp anodized aluminum voice coil and former
  • Fatigue resistant and reduced strain "stitched on" flexible lead wire design
  • Multi-point high-temp/high-strength neck joint bonding technique
  • Spun-laced Nomex insulating reinforcement collar
  • (IDHS) Inductive Damping Heat Sink
  • Custom insulated/isolated compression input terminal assembly
  • Flat edge wound copper clad aluminum wire
  • Triple stacked ferrite magnet structure
  • Sensitivity: 85.4 dB
  • CEA-2031 Compliant
  • 1-year warranty

Package Includes:

  • Power DVC Subwoofer
  • Trim Ring
  • 4 Socket Head Trim Ring Screws
  • 8 Socket Head Wood Screws
  • Socket Head Driver Bit
  • Installation and Operation Manual

Product History:

Rockford Fosgate T2D415 thumbnail
(newest, current model)
Rockford Fosgate T215D4 thumbnail
(previous model, replaced by Rockford Fosgate Power T2D415)

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
Power T2 (Rockford Fosgate)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
2400 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
1200 watts
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
Voice Coil Diameter
Diameter of voice coil, usually measured in inches.
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
85.4 dB
Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
19 mm
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Anodized Aluminum
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Magnet Structure
Defines the overall structure of the subwoofers magnet.
Triple Stacked
Subwoofer Grille
Most subwoofers are able to accommodate a universal grille; however, some subs include a grille and others have a specific, optional grille available for purchase separately. If "yes", then the subwoofer includes a grille. If "optional (sold separately)" the matching grille will need to be purchased in addition to the sub.
Re-Cone Kit Available
Some higher end subwoofers have replaceable cone assemblies. In case of a blown woofer, a recone kit allows for a simple replacement, as opposed to purchasing an entire new subwoofer.

Recommended Enclosure Specifications

Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Ported / Vented
Optimum Sealed Box Volume
This value indicates the ideal sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
Minimum Ported Box Volume
This value indicates the minimum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
2.75 cubic feet
Optimum Ported Box Volume
This value indicates the ideal ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
Maximum Ported Box Volume
This value indicates the maximum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
3.25 cubic feet
Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
Cutout Diameter
The actual diameter of the hole you will need to cut out if you are creating a new mounting location for this speaker, or if you are mounting a subwoofer in a box.
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.


Electromechanical Parameters

Free-Air Resonance (Fs)
The free-air resonance frequency of the subwoofer, measured in Hz. At this frequency the weight of the moving parts is perfectly balanced with the subwoofers suspension system.
31 Hz
Equivalent Compliance (Vas)
This is the amount of air that has the same stiffness as the subwoofers suspension. The greater the rating, the lower the stiffness and larger recommended enclosure. It is measured in Liters.
51.6 liters
Total Speaker Q Value (Qts)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including all dimensionless losses. Essentially, a high Qts value (closer to 1.0) means the subwoofer is great for sealed enclosures and a low Qts value (closer to 0) means the woofer is great in vented enclosures. A Qts of around 0.45 means the woofer will work decently in either enclosure type.
Electrical Q Value (Qes)
The subwoofers relative damping (Q) at the resonance frequency (Fs), including electrical losses. Also called the mechanical damping of the subwoofer. The unitless measurement usually varies from 0.5 10.
Electrical Resistance of Voice Coil (Re)
Amount of DC resistance of the subwoofer when measured with an ohm meter. Typically, this will read less than the impedance rating of the subwoofer.
6.8 ohms
Mechanical Q Value (Qms)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including mechanical losses. Also called the mechanical damping of the subwoofer. This unitless measurement usually varies from 0.5 10.
Efficiency Bandwidth Product (EBP)
This number represents the trade off between having an efficient woofer and one with a wide bandwidth. To calculate this number, take the Fs and divide it by the Qes. If the number is below 50, the woofer is designed for a sealed enclosure only. If it's between 50-100 it can be used in either. Lastly, if it's greater than 100 it's designed for vented enclosures.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


Eupora, MS


March 8, 2012

I have owned many different subwoofers and this is the best i have ever had. It has beautiful lows and and can hit like a 12. I am very impressed with the sound quality of this sub and even more impressed with power this thing has. For the audio enthusiast that wants it all look no further.

16 of 26 found this helpful

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Minocqua, WI

Pounds My Face Off!

December 17, 2011

I upgraded from a 15" Type-R to this guy and it was the best decision I've ever made. Very clean low bass and really brings dubstep to life!

15 of 25 found this helpful

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Roswell, NM

best sub ever!

February 18, 2012

I upgraded to this sub after my p3 15 and im impressed with the performance. The only problem i had was the fact that the first 2 subs i got were defects and i had to pay to send it back to Sonic Electronix. I finally got a good sub the third time and have had no problems since. its been about 5 months now and two sound competitions later and this sub still amazes me with the performance. Overall highly recommend this sub just hold onto the shipping box just in case it turns out to have a defect and that goes with any product.

14 of 24 found this helpful

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The ROCKFORD FOSGATE t2d415. Is Awsome

October 9, 2012

This subwoofer is the biggest loudest sub I have ever had or heard. It is a true spl monster and it also had great sound quality no matter if its at low level or high level. SonicElectronix is def the best place to buy, you will not find a better quality company to buy from and you will never beat the prices they offer!!

12 of 23 found this helpful

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campbellsville, KY

Beastin Down Low....

March 27, 2012

This sub is a monster on the lows. and will take ways more then rated. I have had one in the past and they are crazy strong. really wish i would have got meter it before i got rid of it. easily was doing a 144+db on stock electrical. my only con with it was, this thing is HEAVY... lol grab a fork lift to get it in the box so i had to give a 4 star for use.

But def recommend it for anyone. just make sure you have the power

16 of 31 found this helpful

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January 5, 2012

Amazed with this sub. I was skeptical at first because I listen to a lot of rock as well as rap and hip hop and this sub won't even wince. by far the best reacting 15 I have ever heard and I'm only giving it about 9 bills rms. makes some of my old 12" systems seem like they were mentally challenged. This sub plays some of the cleanest and best sounding bass I have ever heard and it will hit 141.3 dbs in my car. That's a fact... bass raced it. If you have the money and want the best sub 400 and change will buy, you will never regret it.

15 of 29 found this helpful

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Topock, AZ

The best!!

September 18, 2013

These subs are by far the best subs I have owned. I would recommend them to anyone seeking a clean hard hitting sub. there is not one bad thing about these subs for me, I am truly pleased.

11 of 22 found this helpful

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Cool Ridge, WV

This thing pounds

June 18, 2012

My friend has one of these in his car and it will shake the windows driving by. He has a massive amplifier and 0 ga wire. It will take your breath away.

13 of 27 found this helpful

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Killer Sub!

December 22, 2010

This sub hits hard and clean. NIce for a single subwoofer install to save "some" trunk space that 2 12"s would take up and the bass is more than enough for daily use.

11 of 23 found this helpful

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Williamsburg, VA

Hits Hard

September 21, 2013

I love this sub. I only have one. Only need one. I have it hooked up to a RF 1200 watt amp and it really hits hard. And can deffinitely have a bigger amp without over powering it. But 1200 watts is doing awesome and is vary powerful. Great for both comps and sounds quality.

11 of 24 found this helpful

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May 6, 2012

I have 2 of these in my 2003 short bed single cab Sierra customized it in my own. Im powering them with T2500.1bdcp at 2ohm while I break them in, 2 kinetik 2400 right behind seats, duralast gold 1000 cranking amps under hood, and 220 high output alternater. My ride shakes completely and while I drive I see everything blurry and hard to breath. These are powerful subs but cant go wrong. WORTH IT.

14 of 30 found this helpful

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Excellent bass!!!

March 17, 2011

I've got 2 of these bad boys hooked up in a box i made in the back of my 1998 jeep TJ. I temporarly have them hooked up to just one 800 watt amp. and these things still knock my rear view mirror off. All my friends say it has too much power even at 25% but i beg to differ. you can hear me coming from down the street. THESE THINGS ROCK!!! only downside is they are a little slow and you use alot of power. make sure you have a good battery and altenator and youll be fine. THANKS SONIC ELECTRONIX!!!!!! for hookin me up with this sweet deal!

14 of 30 found this helpful

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wow!!! very nice subs

May 31, 2010

wow these subs are amazing! I have four 15" t2s and and 4 1500.1 bd fosgate amps and all i can say is ridiculous bass. well worth the money just make sure you build a box and not a prefab. Tried and the sub blew through the box in the first hour. Built a custom box 11 cubic feet total tuned to about 29hz. Yes i know low build it is brutal

12 of 33 found this helpful

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Accessory Tools and Products

Accessories added

NVX 20 ft. of True Spec 8 Gauge Speaker Wire

Flexible multi-strand cable bends and twists to meet your installation needs.

Your Price $49.99

25 ft. of Streetwires 12 Gauge Speaker Cable

You'll need speaker wire to hook up that new subwoofer!

Your Price $44.95

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $14.99

40 Square Feet of Sound Dampening Material

Thicker than the competition, complete sound damping kit for entire vehicle! Use for trunk, doors, roof and floor.

Your Price $119.99

Dynamat Sound Dampening Bulk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

Your Price $159.99

Stinger Sound Dampening Bulk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for the whole car!

Your Price $99.99

12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

Your Price $6.99

40" x 15 Ft Piece of Premium Un-Backed Automotive Trim Carpet

Durable design for long life-span, available in many colors and shades.

Your Price $39.99

Gold Plated Dual Terminal Banana Plug Connector

Enables an expandable, secure connection accepting up to 8 gauge wire.

Your Price $1.99

2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.

Your Price $7.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $16.99

Xscorpion 9-Piece Nylon Plastic Pry and Chisel Tool Set

Easily removes dash/trims, door clips, panels and pins, rubber grommets and vehicle emblems.

Your Price $14.99

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $8.99

15" Protective Waffle Metal Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe with its durable metal construction!

Your Price $6.99

Scosche SPL Meter

Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.

Your Price $21.99

1 Rockford Fosgate Power T2D415 Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 Rockford Fosgate Power T2D415 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 Rockford Fosgate Power T2D415 Subwoofers

Mono Amp

4 Channel Amp

4 Rockford Fosgate Power T2D415 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Browse 1 question and 1 answer
Hide answersShow all answers | Sort by
is the t2d415 capable of being used in a 6th order bandpass application?
roger g on Jan 15, 2015
Best Answer: Hello Roger,

Of course, but it has to be built DEAD Accurate, and there aren't any parameters to follow. You may want to get with a Rockford Fosgate Tech for more information. However, be prepared for many trials and errors.
Reply · Report · Customer SStaff on Jan 17, 2015
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Product Summary


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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Rockford Fosgate Power T2D415

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