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Rockford Fosgate® Prime 12" R2 4-Ohm DVC Subwoofer

Model #: R2SD4-12
Rockford Fosgate
At a Glance
Car Audio Fanatics wanting big bass can rely on the Prime R2D4-12 subwoofer. This 12” subwoofer handles 250 Watt RMS and the 4-Ohm Dual Voice Coil design lets you to wire them in various configurations.
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Get to know this product.

Car Audio Fanatics who want Rockford Fosgate quality can rely on the Prime Series 10" subwoofers to get the job done, and the Dual Voice Coil provides awesome installation flexibility. These drivers can pump out the bass due to their mica injected polypropylene cone, and their stamp-cast baskets with spider venting - typically reserved for more expensive models - keep the motor running cool! These R2 subwoofers are optimized for sealed and vented enclosures.

  • 12 AWG compression terminals
  • Anodized aluminum voice coil former
  • Optimized for both sealed and vented enclosures
  • Mica injected polypropylene cone
  • Linear spider with embedded 16 AWG tinsel leads
  • StampCast basket with integrated spider venting
  • Integrated PVC trim ring
  • 1 Year Warranty

Stitched Tinsel Leads

Improved reliability and performance by reducing fatigue and possible shorting.


Power handling on Rockford Fosgate speakers conform to CEA-2031 industry standards.

Anodized Aluminum Voice Coil Former

Rockford Fosgate subwoofers use anodized aluminum voice coil formers that provide superior heat dissipation (up to 100° at full power levels). Unlike traditional plastic substitutions, aluminum acts like a heat-sink to quickly dissipate thermal build-up on the voice coil. This keeps subwoofers cool during high SPL conditions.

Klippel Verified

Klippel is a speaker certification program allowing us to deliver the best possible subwoofers.



Magnet Weight (oz)47.7 oz. (1.35 kg)
Shipping Weight9.9 Lbs. (4.49 kg)
Nominal ImpedanceDual 4-Ohm
Power Handling (Watts RMS)250 Watts RMS; 500 Watts Max
Voice Coil Diameter2" (51 mm)
Speaker ConnectorDual 12 AWG compression
Mounting Depth5.067 in. (128 mm)
Fs (Hz)34.9
Vas (Liters)68.8
Cutout Diameter11.25 in. (285 mm)
Woofer Displacement0.046 cu. ft. (1.3 Liters)
SPL (dB @ 1w/1m)89
Xmax (mm)6.5
Sd (cm2)539.1
Subwoofer TypeStandard
Voice Coil TypeDual Voice Coil
Sealed Box Volume (Vb)1.02 cu. ft. (28.8 Liters)
Vented Box Volume (Vb)1.79 cu. ft. (50.6 Liters)

Misc. Specs

Woofer Size12"
Mount Depth3.602
Manufacturer Warranty1 Year
Subwoofer Size12"
Peak Power Rating (Watts)500
RMS Power Handling (Watts)250
Shallow MountYes
WarningProposition 65 Warning for California Residents