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Rockford Fosgate Power T112D4

12" Power Stage 1 Dual 4 ohm Subwoofer

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Rockford Fosgate Power T1D412

OUR PRICE: $449.99

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Rockford Fosgate Power T112D4

12" Power Stage 1 Dual 4 ohm Subwoofer

$239.99

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Single 12" Ported Enclosure Custom Black Baffle

Gold Binding post terminals and a high quality 5/8" MDF construction.

$59.99

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25 ft. of Streetwires 12 Gauge Speaker Cable

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  • 12" Dual 4 Ohm Power Stage 1 Subwoofer
  • Power Handling:
    • Peak: 1200 watts
    • RMS: 600 watts
  • Impedance: Dual 4 ohms
  • Aluminum parabolic woofer cone woofer
  • Rubber surround
  • Frequency response: 20-200 Hz
  • Sensitivity: 86 dB
  • 1-year SonicElectronix.com warranty

Product History:

Rockford Fosgate T1D412 thumbnail
(newest, current model)
Rockford Fosgate T112D4 thumbnail
(previous model, replaced by Rockford Fosgate Power T1D412)

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
12"
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.
1200 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.
600 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.
Dual
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.
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
20 - 200 Hz
Sensitivity
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".
86 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.
14 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.
Silver
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.
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.
Rubber
Magnet Structure
Defines the overall structure of the subwoofers magnet.
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.
No
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.
No

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
Sealed
Minimum Sealed Box Volume
This value indicates the minimum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.0 cubic feet
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.
Maximum Sealed Box Volume
This value indicates the maximum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.5 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.
1.25 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.
2.25 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.
6-11/16"
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.
10-13/16"
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.

No

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.
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.
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.
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
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
100%
4 Star
0%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
5.0
Value
4.7
Features
4.9
Design
5.0
Usability
4.9
Gabe

Bay Area , Ca

Overall
Durability
Value
Features
Design
Usability
Amazing Sub!

May 27, 2010

I used to have 2 Kicker CVR's in the kicker ported box. It was loud but I wasn't satisfied. I upgraded to 2 T1's and man ! It was a big difference.
I can't turn it up all the way . It hurts my ears and I'm afraid my window is gonna blow. lol This subs hits so hard . Its loud period. Definitely worth it !

4 of 5 found this helpful

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Bobby

Pittsburgh baby!

Overall
Durability
Value
Features
Design
Usability
UNREAL DEAL! THESE RETAIL FOR $450 EACH!

January 5, 2010

Well put it this way, they are LOUD! These subs are crazy and im running them in a box built too small for them mainly the frequency is not right but still. Im planning to build the exact recommended box(according to ROCKFORD FOSGATE.com) asap. But im very pleased with them but mostly with how much i saved with sonicelectronicx. THANKYOU THANKYOU

4 of 5 found this helpful

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Shane

Leland, NC

Overall
Durability
Value
Features
Design
Usability
wow

February 15, 2009

I have 2 of these with a 1600rms Hifonics amp.. and holy crap..u cant hardly breathe in my Toyota 4runner.. i was sitting in the yard listening to them and after about 5 minutes. i had to get out because i was getting light headed ...definitely the best subs i have ever heard..i use to have an l5 but sold it and got these..very glad i did that..my friend has three alpine type x's and mine hit harder than his..very very pleased...cant imagine the t2's....but overall well worth every penny

4 of 5 found this helpful

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Zavvan

Greenville, SC

Overall
Durability
Value
Features
Design
Usability
Unbelieveable

February 19, 2005

I own two of these monsters. I knew they were great speakers but could not believe what they can do. The hard hitting bass is stunning. Powered with a good amp and the speakers will laugh in the amount of bass you can pump through them.

3 of 4 found this helpful

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juan

snowflake, AZ

Overall
Durability
Value
Features
Design
Usability
rockfordfosgate t1

December 13, 2013

ive had them for 4 years and still going :) great woofers

2 of 3 found this helpful

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Deitchman

Oklahoma

Overall
Durability
Value
Features
Design
Usability
AMAZING!

February 21, 2010

I have two of these in a ported box with only a 1000 watt kenwood amp giving them about 200 watts each out of 600 rms each and they POUND! I have the loudest system at my school and they are only getting 1/3 of the power! I am fixing to buy the Rockford Fosgate t-1500bd amp and i cant even imagine what they r gonna sound like!

2 of 3 found this helpful

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Grim

Stafford, VA

Overall
Durability
Value
Features
Design
Usability
Great sub

January 15, 2010

This sub hits hard by itself let alone if you pair it up with another. for this price this is a great sub to start up your system. I've got it hooked up to a 600W Alpine amp and it adds plenty of bass to your music. Granted, one of these won't shake your mirrors but it will rattle everything else.

2 of 3 found this helpful

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Luke

Minneapolis, MN

Overall
Durability
Value
Features
Design
Usability
Great sub

December 29, 2009

I managed to pick one of these bad boys up at a pawn shop still in the box brand new for cheap. It is a beast. It looks pretty much bullet proof. I really enjoyed listening to lil jon on this one. It made my seat shake like crazy. It has the capability to shake your seat at 12 hz in a sealed box. Its impressive. If your looking for sound quality and spl, this sub is for you. You wont be disappointed.

2 of 3 found this helpful

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juanpontiac

snowflake arizona

Overall
Durability
Value
Features
Design
Usability
Rockford Fosgate T112D4

November 1, 2009

good subwoofers still bumping good and loud

2 of 3 found this helpful

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John

Oro Valley, AZ

Overall
Durability
Value
Features
Design
Usability
Great Sub

January 28, 2009

I was skeptical when first purchasing this subwoofer but now i am very glad I did. I am running 700 watts RMS to it from a hifonics amp. It blows away my buddy's p3 and my other friends sony woofer. good buy just make sure you set up the deck and amp right and this thing will straight up slam! everyone elses subs have blown up at least once but this thing just keeps thumping.

2 of 3 found this helpful

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Josh

Beaufort, SC

Overall
Durability
Value
Features
Design
Usability
Bass Killer

July 13, 2007

I own 1 T112D4 right now being pushed by a Kwood 9102d amp, in a '97 Satty SL2. and it sounds sick, I know a lot of people have kind of left Rockford's side because they don't make subs like they used to...not in this case, I used to have 2 HX2 12"'s and I think this hits just as good as the HX2's used to. If you want a good high quality sub that will beat the neighbor's head in or win some comp's get this sub!

2 of 3 found this helpful

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Robert

CANONSBURG, PA

Overall
Durability
Value
Features
Design
Usability
BUY FROM SONIC

February 25, 2011

I have bought two of these subs from Sonic and I STILL haven't seen better deals anywhere. I bought these over 1 yr ago and I still havent heard there 'PEAK' performance. Because they ALWAYS want more power and you can't give it to them. I have them in proper custom built (don't buy prefab for these) box and a 'old school' Punch 500 amp which I believes pumps out around 1800-2000 watts. And I have two Prime R300-4 amps. 1 for each door and rear deck speakers in which are alpine type R 6 1/2. Unreal sound and all in a stupid, very little, cavalier. Sounds good to me and I couldn't be any happier. All thanks to you SONIC ELECTRONICS. I would recommend this site to even my dad because I know he wont be getting ripped off!

1 of 2 found this helpful

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Deitchman

Oklahome

Overall
Durability
Value
Features
Design
Usability
AMAZING!!

February 18, 2010

I bought 2 of these and put them in a bandpass box but had to take the plastic ports out bcuz the subs were to big for it. So even tho there is 3 giant holes in it and they r only getting about 250 rms each it is the loudest cleanest system at my school. Im gonna fill in the ports and take the plexi glass out tho and get a RF t-1500bd amp and its gonna b insane!

1 of 2 found this helpful

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Michael

Buena Park, CA

Overall
Durability
Value
Features
Design
Usability
ultimate sounding woofers

April 23, 2008

I have 2 of these in my Toyota 4 Runner truck running with a T1500-BD in a custom made ported box tuned to 40 hz. The bass is very clear, hits hard when I want it to and is tight. These woofers are solid, professionally made, sturdy and are in a class by themselves. These woofers can last a very long time if wired up to a clean amp and not blasted all day. Rockford Fosgate broke the mold on these T1's and on their T2 models. This woofers are well worth the money.

1 of 2 found this helpful

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Nick

Hadley, PA

Overall
Durability
Value
Features
Design
Usability
wow

March 4, 2008

I have two of these subs in a diamond design ported box ran by a t10001bd not enough juice for them but runs them ok, with a cadence 2.5 farad cap. These subs hit everything. the highs and lows. I have had numerous people ride in my car and instantly give them a headache. Amazing subs. watts are not everything. the m3 mojos,kicker L'7s, jl audio w7 cannot compete with this subs power handling when it is only rated 1200 peak and the bass it throws out you.

1 of 2 found this helpful

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Accessory Tools and Products

Accessories added

Single 12" Ported Enclosure Custom Black Baffle

Gold Binding post terminals and a high quality 5/8" MDF construction.

Your Price $59.99

12" Dual Hatchback Style Medium Sealed Subwoofer Enclosure

CARB Compliant, 3/4" MDF Dual Hatchback Style Sealed Enclosure w/ Premium Carpeted Finish

Your Price $69.95

12" Dual Sealed Subwoofer Enclosure

CARB Compliant, 3/4" MDF Dual Vented Enclosure w/ Premium Carpeted Finish

Your Price $89.95

12" Single Hatchback Style Medium Sealed Subwoofer Enclosure

CARB Compliant, 3/4" MDF Single Hatchback Style Sealed Enclosure w/ Premium Carpeted Finish

Your Price $43.95

12" Vented Subwoofer Enclosure

CARB Compliant, 3/4" MDF Vented Enclosure Lined with Premium Carpeted Finish

Your Price $65.95

Single 12" Venteded MDF Subwoofer Enclosure

12" Vented 3/4" MDF Enclosure Lined w/ Polyfil.

Your Price $44.99

25 ft. of Streetwires 12 Gauge Speaker Cable

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

Your Price $37.85

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $14.99

20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

Your Price $53.99

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 $97.99

Stinger Sound Dampening Trunk Kit

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

Your Price $64.87

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 $94.97

Dynamat Sound Dampening Trunk Kit

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

Your Price $87.63

Dynamat Sound Dampening Bulk Kit

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

Your Price $159.99

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 $18.99

Cordless Multi-Functional Heat Tool Soldering Iron Kit

Continuous working lock allows you to work without holding down trigger.

Your Price $74.99

12 oz. Can of Adhesive Spray

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

Your Price $8.97

Gold Plated Dual Terminal Banana Plug Connector

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

Your Price $1.99

Universal 12" Subwoofer Grille

Keep your subwoofer safe from accidental damages with this amazing grill.

Your Price $19.95

Universal 12" Subwoofer Grille

Keep your subwoofer safe from accidental damages with this amazing grill.

Your Price $19.95

12" Protective Waffle Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe.

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 T112D4 Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 Rockford Fosgate Power T112D4 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 Rockford Fosgate Power T112D4 Subwoofers

Mono Amp

4 Channel Amp

4 Rockford Fosgate Power T112D4 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Browse 1 question and 1 answer
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What's the price for 1?
A shopper on Nov 4, 2015
Best Answer: Hello,

Being a discontinued product, we do not have pricing information.
Reply · Report · Rick MStaff on Nov 4, 2015
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

T112D4

UPC

780673151321

Weight

30.00lbs

Internal SKU

t112d4

Internal Product ID

2530

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 T112D4

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