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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.

Read more from Crutchfield writer, Jo G.

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$69.99 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
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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

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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
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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3 questions already asked

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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