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.
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.
- 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
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)
Rockford Fosgate R2D4-12 reviews
Love the sub
Pros: Great sub
Cons: No grilles made for this subwoofer
3 of 3 found this helpful
I read some negative comments received on this sub and I can't understand why. It's not completion bass but more than enough for me. I'm running a 250 watt(800 max) RMS 4 ohm mono amp and it's enough to move quarters across the dash. All and all I can say I would definitely purchase again. Especially from Crutchfield!
2 of 2 found this helpful
Very affordable, well built, dependable subs that will turn any head within a mile Rockford Fosgate stands for quality and even theyre lower end equipment is simply ear numbing. Rockford for life!!!! Travis
3 of 4 found this helpful
I'm 28, been doin this a while, off and on. Bottom line, great speaker for the $$. I have it in a sealed truck box with an old school bd501 fosgate power amp pushing it. The setup sounds great! I just wanted to add a little bass back into my ride and wow i got way more than expected. Rockford fosgate speakers still sound great and crutchfield still #1 in custom service and products sold!
5 of 5 found this helpful
Very impressed with what I got. It performs way better than I expected and i will definitely recommend this to others. I currently have my single 12" wired at a 2ohms and it has massive punch and bass. Thank you.
6 of 7 found this helpful
Nice speaker. Crutchfield is the best
5 of 7 found this helpful
3 of 6 found this helpful
I bought this sub to replace an MTX Thunder 4000 and right off the bat is noticeably better sound and hits a lot harder. I'm running this off of a 2 channel 1000watt Sony xplod and I will be purchasing another one of these subs soon.
Pros: Tight, acurate bass in sealed enclosure. Excellent for metal and rock.
Cons: I still need to get a second matching sub. Otherwise none.
3 of 3 found this helpful
I have this in my 2010 Civic sedan mated to a RF Punch 300-1 and it's wonderful. Very tight and you can feel the punch. Dynamat is a must with this kind of bass, unless sqeaks and rattles are your thing.
Pros: Low cost, good looks, GREAT sound.
5 of 5 found this helpful
More details on the Rockford Fosgate R2D4-12
Features & specs
|Impedance||2 ohms or 8 ohms|
|Cone Material||Mica injected poly|
|Ideal Sealed Box Volume (cubic feet)||1.02|
|Ideal Ported Box Volume (cubic feet)||1.79|
|Port diameter (inches)||4|
|Port length (inches)||9.3|
|Dual Voice Coil||Yes|
87 dB at 1 watt |
|Frequency Response||43 - 250 Hz|
|Max RMS Power Handling||250|
|Peak Power Handling (Watts)||500|
|Top Mount Depth (inches)||5 1/4|
|Bottom Mount Depth (inches)||N/A|
|Cutout Diameter or Length (inches)||11 1/16|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
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.
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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