Rockford Fosgate R2SD2-12

Prime R2 Series 12" shallow subwoofer with dual 2-ohm voice coils

Item #: 575R2SD212

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3 Reviews

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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 R2SD2-12 sub features a 12" 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 250 watts RMS, with a mounting depth of only 3-5/8". 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 2-ohm voice coils allow you to wire this sub for 1- or 4-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 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

Product Highlights:

  • 12" shallow-mount subwoofer with dual 2-ohm voice coils
  • mica-injected polypropylene woofer cone with poly-foam surround
  • stamped solid-steel frame
  • power range: 100-250 watts RMS (500 watts peak power)
  • frequency response: 43-250 Hz
  • sensitivity: 81 dB
  • top-mount depth: 3-5/8"
  • sealed box volume: 0.9 cubic feet
  • ported box volume: 1.79 cubic feet
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's a component sub and why would I want one?

A component sub is simply a speaker that's designed to reproduce bass once it's installed in a compatible enclosure. Think about the impact of a movie soundtrack in a big theater or even in your own home HDTV setup. A component sub can add the same kind of power to the music in your car. And a car sub is not all about the boom that you hear on a street corner (although that's cool too) - you can pair a component sub with your choice of enclosure to get bass just the way you like it, from tight and punchy to fat and loose. And once you experience music in your car with a well-tuned subwoofer, you'll never go back.

Rockford Fosgate R2SD2-12 Reviews

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love it....

Written By Tim H, Muscatine Iowa on Wednesday, February 11, 2015

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
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    Value

I put it in my car cause I haven't run the wiring on my truck yet, but it works well.

Pros: Heavy bass great quality. Directions. For wiring

Cons: It is a little different setup from a standard sub I was unsure how to wire it at first

Rockford Fosgate R2SD2-12

Written By Scott, Chicago Park, CA on Friday, October 03, 2014

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Just got one of these hooked up today. I must say I couldn't believe the sound that this one sub puts out in my truck( 2001 ford f350 crew cab). I bought it in a pre fab enclosure and it sounds amazing. It'll crank as loud as the head unit will go and no distortion, crisp clean bass, and hits the lows fairly well. If your looking for something that's not gonna break the bank and sounds great. This is it!

Rockford 12 ' s low profile not low on bass.

Written By Charlie, Tallahassee, FL on Wednesday, September 10, 2014

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

This is the bass I always wanted in a thin package. In a custom cabinet I found online, two of these fit behind the seat of my crew cab Ford F250. Nobody knows they are there. With 500 watts rms running mono @ 2 ohms, these have a solid, clean bass that is as perfect as I have found. No distortion at higher volumes either.

Pros: Nice thin fit. Clean sound. Solid construction.

Cons: Probably gonna get a ticket now for loud stereo....

Hands-on research

What's in the box?

Download owner's manual

  • One shallow-mount 12" Dual 2-ohm voice coil woofer
  • Eight 1-1/8" Self-tapping screws
  • 4mm Allen bit
  • Installation and Operation manual (English/ French/ Spanish/ German)

Product Research

Features

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 2-ohm Voice Coils: This woofer features dual 2-ohm voice coils to offer wiring flexibility. When the voice coils are wired in parallel the woofer presents a 1-ohm mono load, when wired in series it presents a 4-ohm mono 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 0.9 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.

Vented Box Volume: Rockford Fosgate recommends a vented enclosure with an internal volume of 1.79 cubic feet using a 4" diameter x 11.8" long port tube; this yields a tuning frequency of 40 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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