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Rockford Fosgate R2D4-12

Prime R2 Series 12" subwoofer with dual 4-ohm voice coils

Item # 575R2D412

Rockford Fosgate's Prime R2 subs deliver strong bass in your car, and they are definitely built to last.

Rockford Fosgate's Prime R2 subs deliver strong bass in your car, and they are definitely built to last.

Item # 575R2D412

In stock

$104.99 -$5.00 Price break

$99.99 each

60-day returns

If you don't love it, send it back.

Free lifetime tech support

Whenever you need a hand.

Free custom vehicle instructions

Installation help for your car, from our experts.

About the Rockford Fosgate R2D4-12

Rockford Fosgate's Prime R2 subs deliver strong bass in your car, and they are definitely built to last. The R2D4-12 sub features a 12" mica-injected polypropylene cone that works with a high-density poly-foam surround to punch out fat, deep notes. Rockford Fosgate stitches the tinsel leads that carry the signal to the voice coils directly into the cone — they'll hang tough through heavy use so you get consistent, reliable performance. The stamped solid-steel frame offers venting usually found in high-end subs that keeps this sub running cool.

Rockford Fosgate's Prime R2 subs deliver strong bass in your car, and they are definitely built to last. The R2D4-12 sub features a 12" mica-injected polypropylene cone that works with a high-density poly-foam surround to punch out fat, deep notes. Rockford Fosgate stitches the tinsel leads that carry the signal to the voice coils directly into the cone — they'll hang tough through heavy use so you get consistent, reliable performance. The stamped solid-steel frame offers venting usually found in high-end subs that keeps this sub running cool.

Dual 4-ohm voice coils allow you to wire this sub for 2- or 8-ohm impedance, giving you more flexibility in setting up your system. Rockford Fosgate optimizes this Prime sub for both sealed and ported enclosures so you can choose the type of bass you want in your ride.

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Product highlights:

  • 12" subwoofer with dual 4-ohm voice coils
  • mica-injected polypropylene woofer cone with poly-foam surround
  • stamped solid-steel frame
  • power range: 50-250 watts RMS (500 watts peak power)
  • frequency response: 43-250
  • sensitivity: 89 dB
  • top-mount depth: 5-1/8"
  • sealed box volume: 1.02 cubic feet
  • ported box volume: 1.79 cubic feet
  • grille not included
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # R2D4-12

What's in the box:

  • One 12" Dual 4-ohm voice coil subwoofer
  • Eight 1-1/8" Allen head screws
  • 4mm Allen head bit
  • Installation/Operation manual (English/ French/ Spanish/ German)

Customer reviews

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Rockford Fosgate R2D4-12 reviews

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More details on the Rockford Fosgate R2D4-12

Pat M.

Features & specs

Size 12 -inch
Impedance (Ohms) 2, 8
Cone Material Mica injected poly
Surround Material Poly-foam
Ideal Sealed Box Volume (cubic feet) 1.02
Ideal Ported Box Volume (cubic feet) 1.79
Port diameter (inches) 4
Port length (inches) 9.3
Free-Air No
Dual Voice Coil Yes
Sensitivity 87 dB at 1 watt
Frequency Response 43 - 250 Hz
Max RMS Power Handling 250
Peak Power Handling (Watts) 500
Top Mount Depth (inches) 5 1/4
Bottom Mount Depth (inches) N/A
Cutout Diameter or Length (inches) 11 1/16
Vas (liters) 68.8
Fs (Hz) 35
Qts 0.6
Xmax (millimeters) 6
Parts Warranty 1 Year
Labor Warranty 1 Year
The Rockford Fosgate R2D4-12 replaces these items:

Product Research

Features
Enclosure Compatibility

Features

Overview: The Rockford Fosgate Prime R2D4-12 is a 12-inch subwoofer with dual 4Ω voice coils. The sub features a StampCast steel frame, quick-release compression terminals, and a mica injected polypropylene cone. An anodized aluminum voice coil former and spider venting help keep the subwoofer cool.

Steel Basket: The R2D4-12 subwoofer features a StampCast steel basket for added rigidity.

Compression Terminals: The Prime R2D4-12 features spring post terminals which accommodate speaker wire up to 12 gauge.

CEA-2031 Compliant: Power handling on the Rockford Fosgate Prime R2D4-12 subwoofer conforms to CEA-2031 industry standards. This means the subwoofer has the capacity to handle power under continuous demand, not instantaneous power handling, that over time, can damage voice coils.

Enclosure Compatibility

Sealed Box: Rockford recommends a sealed enclosure with an optimum internal volume of 1.02 cubic feet (from 0.75 to 1.25 cubic feet is acceptable). Sealed enclosures provide the most control over a woofer, will handle a lot of power, and provide accurate sonic reproduction, making them suitable to all types of music.

Ported Box: Rockford recommends a ported enclosure with an internal volume of 1.79 cubic feet using one 4" diameter x 9.3" long port; this yields a tuning frequency of 45 Hz. Ported (or vented) enclosures typically provide better overall efficiency than sealed so they are suitable for use with smaller amplifiers, giving you more bass output from less power. However, this efficiency comes at the expense of very low frequency output (below 40Hz).

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Customer Q&A

7 questions already asked

Q
I have a 2022 Honda Accord sport would these be enough subs for my 600 watt kenwood amp? Or should I get a bigger amp
[ James  Jun 26, 2022 ]
1 answer
A
For help with matching subs and amps, please give our advisors a call at 1-800-324-9695. We're happy to help make sure everything is a good match!
[ Z  Jun 26, 2022 ]  Staff
Q
Does anyone know where to get a grill for this speaker?
[ Manny  Oct 28, 2020 ]
1 answer
A
We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question.
[ Calvin  Nov 25, 2020 ]  Staff
Q
Can I replace this sub with the Rockford P300 12? I cant verify the ohms on the amp is it possible for you guys to run a test?
[ Tommy boy  Oct 21, 2020 ]
1 answer
A
We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question.
[ Calvin  Nov 13, 2020 ]  Staff
Q
Will this speaker, the R2D4-12, replace the speaker in the R2S-1X12 sealed enclosure?
[ Brian  Aug 03, 2019 ]
1 answer
A
Best not too guess on this one. Remove the bad sub and measure the distance to the back of the box. This is a very shallow box and I don't think that sub will work.
[ KYLE  Aug 03, 2019 ]
Q
Want to use (1) sub, what size amp would be recommended?
[ golfplayr2  Jun 03, 2017 ]
1 answer
A
Thanks for your question. For information on selecting the best amp for your sub I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system.
[ Kenny  Jun 03, 2017 ]  Staff
Q
Could a Rockford Fosgate Punch 201S 2-Channel Car Amp power one R2D4-12?
[ FAbian brito  Apr 09, 2017 ]
1 answer
A
Yes it will power one but if u decide to go to two u will have to up grade again. If u are thinking about running two 12" go ahead now and up grade so u want have to later
[ James  Apr 10, 2017 ]
Q
Just wanna know what size amp I should get, rms wise.... to push 2 of these without blowing them out but still sound good and clean?
[ Mathew  Aug 12, 2014 ]
1 answer
A
Thanks for your question. For information on selecting the best amp for your subs I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system.
[ Krissy  Aug 12, 2014 ]  Staff
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