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Rockford Fosgate Prime R2 R2SD4-12

500W Peak (250W RMS) 12" Prime Series Dual 4-ohm Shallow Car Subwoofer

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• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Dual 4 ohm
• Mica Injected Polypropylene - MIPP Cone
• Poly-Foam Surround
• Mount depth: 3.602"
• Sensitivity: 85 dB

Learn more about the r2sd412
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List price $179.99
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Current Promotions (1 offer)


Get a Free roll of Belva 16 Gauge Speaker Wire. Simply click the "Add Both to Cart" button and you will see your savings at checkout. This offer cannot be combined with any other coupons or offers.

Rockford Fosgate Prime R2 R2SD4-12

100% off


Priced separately $172 98

Promo Savings of $12 99

Total price:

$159 99

Product Highlights


• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Dual 4 ohm
• Mica Injected Polypropylene - MIPP Cone
• Poly-Foam Surround
• Mount depth: 3.602"
• Sensitivity: 85 dB

Description


Rockford Fosgate brand icon

Authorized dealer


Prime R2SD4-12

When you have no space for bass, our R2 12" shallow subwoofer can help satisfy your need for low frequency music. These drivers can fit in tight spaces due to an elevated motor structure that reduces speaker depth. Mica injected polypropylene cones make sure bass notes are clean and accurate. Stamp-cast baskets feature spider venting typically reserved for traditional depth mounted models to keep the motor cool! These shallow subwoofers are optimized for sealed enclosures.


Product Details:

  • 12" Dual 4 ohm Prime Series Subwoofer
  • Power Handling:
    • Peak: 500 watts
    • RMS: 250 watts
  • Mica Injected Polypropylene - MIPP Cone
  • Poly-Foam Surround
  • 12 AWG compression terminals
  • Optimized for sealed enclosures
  • Shallow Motor Assembly
  • Integrated PVC trim ring
  • StampCast basket with integrated spider venting
  • 2" High Temperature Aluminum Voice coil
  • 10 mm Xmax
  • 51 oz. Double Stacked magnet motor structure
  • Frequency Response: 43 - 250 Hz
  • Resonance Frequency (Fs): 30.3 Hz
  • Sensitivity: 85 dB
  • Recommended sealed box volume: 0.90 cubic feet
  • Recommended ported box volume: 1.79 cubic feet
  • Top-mount depth: 3.602"
  • Cutout diameter: 11.25"
  • CTA-2031 Compliant
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

  • Priced Individually

PDF IconRockford Fosgate R2SD412 owner’s manual

Subwoofer Wiring Guide


Wiring Guide to Wire 1 Rockford Fosgate Prime R2 R2SD4-12 Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 Rockford Fosgate Prime R2 R2SD4-12 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

Wiring Guide to Wire 3 Rockford Fosgate Prime R2 R2SD4-12 Subwoofers

Mono Amp

4 Channel Amp

Wiring Guide to Wire 4 Rockford Fosgate Prime R2 R2SD4-12 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp


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Specifications & Details


Subwoofer Specifications
Series
Prime Series
Subwoofer Size
12"
Peak Power Handling
500 watts
RMS Power Handling
250 watts
Voice Coil(s)
Dual
Impedance (Per Voice Coil)
4 ohm
Voice Coil Material
Aluminum
Voice Coil Diameter
2"
Frequency Response
43 - 250 Hz
Sensitivity
85 dB
Xmax (millimeters)
10 mm
Subwoofer Design
Round / Circle
Main Cone Color
Black
Woofer Composition
Mica Injected Polypropylene - MIPP
Woofer Surround
Poly-Foam
Magnet Structure
Double Stacked
Magnet weight
51 oz.
CTA-2031 Compliant
Yes
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Sealed
Optimum Sealed Box Volume
0.90 cubic feet
Optimum Ported Box Volume
1.79 cubic feet
Top-Mount Depth (Mounting Depth)
3.602"
Cutout Diameter
11.25"
Shallow Mount Installation
Yes
T/S Parameters (Electromechanical)
Free-Air Resonance (Fs)
30.3 Hz
Equivalent Compliance (Vas)
65.4 liters
Total Speaker Q Value (Qts)
0.65
Electrical Q Value (Qes)
0.72
Electrical Resistance of Voice Coil (Re)
6.80 ohm
Mechanical Q Value (Qms)
7.00
Efficiency Bandwidth Product (EBP)
42
What is in the box?
Paperwork
User manual
WITB: Subwoofers
Subwoofer
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

R2SD4-12

Weight:

11.00lbs

Internal SKU:

r2sd412

Internal Product ID:

36317

Product and How-to Videos


  • Car Subwoofer Size Buying Guide | What Size of Sub Should I Get?
  • How to Install a Car Subwoofer in a Box

Customer Ratings & Reviews


Rockford Fosgate Prime R2 R2SD4-12 thumbnail image

5 star
83%
4 star
17%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
4.9
Features
4.8
Design
4.9
Usability
4.9

Customer Reviews

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Rockford Fosgate R2SD4-12

At first i was very unhappy with these woofers. But after a week or two of using them they seemed to get louder and better. Still not what i was hoping for but i can't complain with my crappy amp. I have a crew cab with two of these behind the seat. They do a good job of putting out the bass threw out the cab.

By Jason on November 3, 2013

65 found this helpful


Very nice shallow subwoofer

I bought this for an install I did for a friend. I wish we could have used a larger box. This is a great sub that would be even better in large box.

By Mike on November 24, 2013

61 found this helpful


Subs review

i would recommend these to anyone. they sound great. Haven't had a single problem with them. 2002 chevy silverado 1500hd crew cab. they're under the seats.

By Nick on July 29, 2013

58 found this helpful


Nothin like a Fosgate

I am i huge fan of this brand and the R2sd4-12 was just another example of why it is such an amazing brand. This is an excellent subwoofer, it's cheap, and it fits in small spaces. Can't ask for much more.

By Alex on June 8, 2013

57 found this helpful


Update

I did order another one and wired the dual 4 ohm voice coils in parallel and surprisingly I put a multi-meter up to it and measured for ohms and got a reading of 3.6 ohms on both subs. Not bad, not bad at all.

By dkeproductions on May 8, 2014

57 found this helpful


thumping

I have 2 of these installed in a sealed unit on the mid gate of a 2002 avalanche. I have a planet audio ac1800.5 amp pushing them and they sound sweet. I like the tight clean sound but the will boom with the best.

By Bruce on April 3, 2014

57 found this helpful


Very good shallow mounts

Mounted 2 of these in a sealed box under the rear seat in a supercrew truck running 1000 watts @ 1 ohm. The box spec was just over .5 cu ft each and even with poly fill the air space is a bit under but I heard these could probably handle it and they did. I've worked at a pro installer years ago and I would not have expected the bass quality these produce in such a shallow mount and tight box. I'm pretty impressed and at this price I'd say they're tough to beat in terms of value.

By Scott on June 29, 2013

54 found this helpful


awesome!

If You're Looking For Huge Bass, These Are Not The Subs You Want. But If You're Looking For Great Sound Quality With GoOd Thump In A Small AreA, These Are What You Want! Tight And Responsive, Clean SOund, And A Great Product. Would Buy Again!

By michael on November 19, 2013

54 found this helpful


Great Sound!

The speaker sounds incredible. I built a speaker box to replace the stock floor in the hatch area of my Mazda3 because I didn't want to use up all of my valuable storage space with a speaker box. Since my dimensions only allowed me a 3" mounting depth and approx. a 1cu. ft enclosure volume, I had to start shopping around for a shallow mount speaker that would work with such a small enclosure.

I have the speaker powered by an old Kicker ZR360 in bridged mode @ 4 ohms. With this set up, I'm putting about 360 watts RMS into the speaker. Let me tell you, the speaker downright bumps.

I wouldn't hesitate to recommend this speaker to anyone looking for a shallow mount and/or low volume speaker setup.

By Joe on June 5, 2013

53 found this helpful


Great value!

It's hard to find a better value than this shallow sub. It doesn't hit as hard as my 12" L7 on the same Punch 300 amp but that's kind of comparing broccoli to asparagus.. Buy this sub! Awesome value.

By Mike on November 12, 2013

52 found this helpful




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