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Rockford Fosgate R2SD4-10

Prime R2 Series 10" shallow subwoofer with dual 4-ohm voice coils

18 Reviews | 3 questions - 9 answers

Item # 575R2SD410

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Our take on the Rockford Fosgate R2SD4-10

Rockford Fosgate's Prime R2 shallow-mount subs deliver satisfying bass even in smaller cars where space is tight. A special elevated motor structure lets these low-profile subs work in extremely compact enclosures, while still handling plenty of power.

Rockford Fosgate's Prime R2 shallow-mount subs deliver satisfying bass even in smaller cars where space is tight. A special elevated motor structure lets these low-profile subs work in extremely compact enclosures, while still handling plenty of power.

The R2SD4-10 sub features a 10" mica-injected polypropylene cone that works with a high-density poly-foam surround to punch out fat, deep notes. This shallow-mount workhorse will handle up to 200 watts RMS, with a mounting depth of only 3-1/2". Rockford Fosgate stitches the tinsel leads that carry the signal to the voice coils directly into the cone, so they'll hang tough through heavy use. The stamped solid-steel frame offers the same venting found in standard-mount Rockford Fosgate subs to keep 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 150 and 300 watts RMS at 2 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

These subs work great great response and fit perfectly in the small space below the rear seat

John D, Dearborn Heights, MI

What's in the Box:

  • One shallow-mount 10" Dual 4-ohm voice coil woofer
  • Eight 1-1/8" Self-tapping screws
  • 4mm Allen bit
  • Installation and Operation manual (English/ French/ Spanish/ German)

Product Highlights:

  • 10" shallow-mount subwoofer with dual 4-ohm voice coils
  • mica-injected polypropylene woofer cone with poly-foam surround
  • stamped solid-steel frame
  • power range: 100-200 watts RMS (400 watts peak power)
  • frequency response: 45-250 Hz
  • sensitivity: 82 dB
  • top-mount depth: 3-7/16"
  • sealed box volume: 0.7 cubic feet
  • ported box volume: 1.4 cubic feet
  • warranty: 1 year
  • Our 60-day money-back guarantee

Rockford Fosgate R2SD4-10 Reviews

Average Customer Review(s):

(18 Reviews)
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Hands-on research

Product Research


Shallow Mount Design: The Rockford Fosgate Prime R2 Shallow Subwoofer is designed and engineered with a much smaller motor assembly which reduces the overall depth of the woofer allowing it to fit in shallower enclosures and tighter locations of your vehicle.

Dual 4-ohm Voice Coils: This woofer features dual 4-ohm voice coils to offer wiring flexibility. When the voice coils are wired in parallel the woofer presents a 2-ohm load, when wired in series it presents an 8-ohm load.

Spring Post Assembly: The woofer features compression input terminals with attached 16-gauge stitched tinsel lead wires. The nickel plated spring posts will accept pin connectors, single banana plugs, and bare wire up to 12-gauge.

Sealed Box Volume: Rockford Fosgate recommends a sealed enclosure with an optimum internal volume of 0.7 cubic feet (from 0.5 to 0.75 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.

Vented Box Volume: Rockford Fosgate recommends a vented enclosure with an internal volume of 1.4 cubic feet using a 4" diameter x 13.7" long port tube; this yields a tuning frequency of 42 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 35 Hz).

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

rockfords subs all sound great. [ B  Sep 27, 2016 ]
Good price for a decent shallow mount sub [ BRADLEY  Aug 23, 2016 ]
Dynamite sounding speaker [ Guest  May 31, 2016 ]
Blew one needed another [ Shaunathan  Apr 03, 2016 ]
3 of them fill my f150 behind the seat. just enough air in the box I built. 500x1d, 3 10"@4ohm. 2.6ish ohms. ROCKS!!!! [ jason  Mar 08, 2016 ]
I have three. Wanted lots more. Went for 8 in the cab. [ CURTIS  Feb 12, 2016 ]

3 questions already asked

I bought a Rockford Fosgate Prime R600X5 600W RMS 5-Channel Car Amplifier to power my system using these same 10" subs. It sounds great! [ Mitch  Mar 10, 2016 ]
I bought two of these and put in an under the backseat box of a ram. I also had aftermarket speakers. I used a 14 year old 600 watt kenwood amp and they worked just fine for me. I listen to different kinds of music and they all sound good with this setup [ Paul  Mar 09, 2016 ]
If you're happy with the performance of the door speakers off of the deck leave them there. And get a 500 W class D Rockford amp for the two Subs. [ CURTIS  Mar 09, 2016 ]
I always prefer Rockford Fosgate amplifiers for a Woffer I would suggest a mono amp with two channels and A & B I use a Rockford Fosgate 300 mono a&b channel bridged to drive 1 -10 I hope that helps you [ PAMELA S  Mar 09, 2016 ]
Personally have a 4 channel amp for my all of my door speakers (infinity kappa five amp, and infinity kappa speakers), then I got a 400w rms at 4ohm kenwood amplifier, that was faftory referbished from crutchfield and I'm very happy with it. I would get the 2 ohm verion of the subwoofer if you're going yo power 2 subs because you can get a 400w 2ohm amp cheaper than a 400w 4ohm amp. Hope it helps! [ Andrew  Mar 08, 2016 ]
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  Nov 03, 2014 ]  Staff
What amp Is best if I wanted to run two of these subs under my back seats in an extended cab GMC Sierra? [ Tyler  Nov 03, 2014 ]
This would need to be a custom install, so we don't have exact fit information. However, if you would like to contact and Advisor by phone or chat they may be able to pull up your vehicle and determine the mounting depth available. [ Jeff  Dec 06, 2013 ]  Staff