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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.

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$84.99 each

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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.

To drive this single subwoofer, we recommend a mono amplifier rated between 200 and 375 watts RMS at 2 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

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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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Rockford Fosgate R2D4-12

Josh from Clinton, IA on 9/28/2017

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Love the sub

Pros: Great sub

Cons: No grilles made for this subwoofer

Crutchfield response on

3 of 3 found this helpful

Rockford Fosgate R2D4-12

jared from Lynchburg, VA on 4/16/2017

2000 Saturn SW2

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I read some negative comments received on this sub and I can't understand why. It's not completion bass but more than enough for me. I'm running a 250 watt(800 max) RMS 4 ohm mono amp and it's enough to move quarters across the dash. All and all I can say I would definitely purchase again. Especially from Crutchfield!

Pros: Price

Cons: None

Crutchfield response on

2 of 2 found this helpful

Rockford Fosgate R2D4-12

ltravis from Rochester, MN on 1/14/2017

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Very affordable, well built, dependable subs that will turn any head within a mile Rockford Fosgate stands for quality and even theyre lower end equipment is simply ear numbing. Rockford for life!!!! Travis

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3 of 4 found this helpful

Great sound for the $$

Kev88 from mobile, AL on 3/28/2016

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I'm 28, been doin this a while, off and on. Bottom line, great speaker for the $$. I have it in a sealed truck box with an old school bd501 fosgate power amp pushing it. The setup sounds great! I just wanted to add a little bass back into my ride and wow i got way more than expected. Rockford fosgate speakers still sound great and crutchfield still #1 in custom service and products sold!

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Crutchfield response on

6 of 6 found this helpful

Very pleased

D from Watertown, NY on 10/22/2015

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Very impressed with what I got. It performs way better than I expected and i will definitely recommend this to others. I currently have my single 12" wired at a 2ohms and it has massive punch and bass. Thank you.

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Cons:

Crutchfield response on

6 of 7 found this helpful

Rockford Fosgate R2D4-12

Blake from Pell City, Al on 5/28/2015

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Nice speaker. Crutchfield is the best

Pros:

Cons:

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5 of 7 found this helpful

Win

Maynard from Hempstead on 5/3/2015

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Really good

Pros:

Cons:

Crutchfield response on

3 of 6 found this helpful

Tight bass

Kminosky from Zanesville, Ohio on 4/19/2013

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I bought this sub to replace an MTX Thunder 4000 and right off the bat is noticeably better sound and hits a lot harder. I'm running this off of a 2 channel 1000watt Sony xplod and I will be purchasing another one of these subs soon.

Pros: Tight, acurate bass in sealed enclosure. Excellent for metal and rock.

Cons: I still need to get a second matching sub. Otherwise none.

Crutchfield response on

3 of 3 found this helpful

Powerful and clean

Tyler S from Frederick, MD on 11/30/2012

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I have this in my 2010 Civic sedan mated to a RF Punch 300-1 and it's wonderful. Very tight and you can feel the punch. Dynamat is a must with this kind of bass, unless sqeaks and rattles are your thing.

Pros: Low cost, good looks, GREAT sound.

Cons: None.

Crutchfield response on

6 of 6 found this helpful

Great for small cars

Andy from Maryville, IL on 6/12/2012

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I bought this for my nissan versa it works excelently.

Pros: Great quality for price

Cons:

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More details on the Rockford Fosgate R2D4-12

Pat M.

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

Q
Crutchfield asked: Why did you buy this?
A
Shallow enough to fit under the back seat of my pickup, and the quality of Rockford Fosgate products. [ John  Jul 14, 2019 ]
A
Nicely priced sub with 4-ohm DVC at 250w RMS! The sensitivity is also great for this price! Lovely looking sub. [ Michael  Jun 23, 2019 ]
A
Quality and mounting depth [ Earnest  May 25, 2018 ]
A
Because it has the right power handling characteristics for my amplifier. It also has the proper shallow depth required for my sealed box. [ daniel  May 22, 2018 ]
A
Reviews and price [ jared  Apr 01, 2017 ]
A
Good sounding speakers [ James  Jan 20, 2017 ]
A
Great bang for the buck, sounds great in a tube [ Paul  Oct 29, 2016 ]
A
Bumps [ angela  Aug 03, 2016 ]
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4 questions already asked

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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