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Rockford Fosgate R2SD4-12

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

Item # 575R2SD412

Rockford Fosgate's Prime R2 shallow-mount subs deliver satisfying bass even in smaller cars where space is tight.

Rockford Fosgate's Prime R2 shallow-mount subs deliver satisfying bass even in smaller cars where space is tight.

Item # 575R2SD412

Ships free

Temporarily out of stock

Ship date unknown

$94.99 each

About the Rockford Fosgate R2SD4-12

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 R2SD4-12 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 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" shallow-mount subwoofer with dual 4-ohm voice coils
  • mica-injected polypropylene woofer cone with poly-foam surround
  • stamped solid-steel frame
  • power range: 100-250 watts RMS (500 watts peak power)
  • frequency response: 29-250 Hz
  • sensitivity: 85 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
  • MFR # R2SD4-12

What's in the box:

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

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More details on the Rockford Fosgate R2SD4-12

Pat M.

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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 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 mono load, when wired in series it presents an 8-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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Customer Q&A

6 questions already asked

Q
1999 Cadillac Seville STS W/Bose - Will I be able to replace the stock subwoofer with this one. If so, is it a direct replacement, or do I need to upgrade the amp?
[ Dexter  Sep 21, 2020 ]
1 answer
A
This subwoofer can physically fit the factory location but is not a good to match to the stock amp. The factory subwoofer is a DVC 2 ohm model. While there is a DVD 2 ohm version of this subwoofer, these models need more power than the stock amp can output to play well. I recommend installing a new amp to power the subwoofer and we have advisors that you can reach by calling 1-800-324-9695 who will be happy to help give you a recommendation on one to use.
[ Paul  Oct 17, 2020 ]  Staff
Q
What is the speaker displacement?
[ Wayne  Apr 13, 2020 ]
1 answer
A
Hi Wayne, thank you for your question. The Rockford Fosgate R2SD4-12 has a speaker displacement of 0.039 cubic feet.
[ Jess  Apr 28, 2020 ]  Staff
Q
What amp would you recommend running with this sub?
[ Joshua  Jan 03, 2016 ]
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  Jan 04, 2016 ]  Staff
Q
what is a set of these speakers worth that are used and in their individual boxes. I found a set of two in individual boxes that were made for these speakers and the guy wants 125 for the both of them. So is this a good price yes or no?
[ Vernon  Dec 27, 2014 ]
1 answer
A
I forwarded your question to an Advisor and they responded with the following: I'm not sure exactly what the value would be on a used sub but I personally think that is a good price for two. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat.
[ Krissy  Jan 01, 2015 ]  Staff
Q
What amp do you recommend that is good, but still reasonably priced?
[ Dolph  Sep 04, 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  Sep 05, 2014 ]  Staff
Q
Can u put these flat subs in a ported box or are they better in a sealed box?
[ Joseph  May 17, 2014 ]
1 answer
A
I forwarded your question to an Advisor and they responded with the following: You can use those in either a sealed or ported box. A sealed box will need a volume around 0.9 and a ported 1.79. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat.
[ Krissy  May 20, 2014 ]  Staff
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