PRIME R1S4-12 – 12” Prime R1 4-Ohm SVC Subwoofer

PRIME R1S4-12 – 12” Prime R1 4-Ohm SVC Subwoofer


The R1S4-12 features a 4-Ohm Single Voice Coil design, 150 Watt RMS power handling, and is optimized for both sealed and vented enclosures.

SKU: R1S4-12 Categories: ,

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Rockford Fosgate Prime R1 12” subwoofers provide high performance bass at an unbelievable value. This model features a laser etched curvilinear dust-cap to dissipate heat generated by the high‐temp copper voice coil as well as a solid stamped steel frame with integrated frame mounted compression terminals. Best of all, they are optimized for both sealed and vented enclosures.

  • Fiber reinforced painted paper-pulp cone
  • Laser-etched aluminum dustcap
  • High durability compressed foam surround
  • Fatigue resistant poly-cotton spider with integral woven leads
  • Proprietary powder coated stamped steel frame with spider cavity venting
  • Bumped backplate with vented pole piece for greater thermal/mechanical power handling
  • High-temp copper voice coil with aluminum former
  • High-grade Y30 Ferrite magnet
  • Integrated spring-loaded nickel-plated push terminals
  • Integrated ABS decorative trim ring



  • CEA-2031 Compliant: CEA-2031 Guidelines
  • Size: 12"
  • Nominal Impedance: 4-Ohm
  • Power Handling (Watts RMS): 200 Watts RMS | 400 Watts Max
  • Voice Coil Diameter: 2.0" (50.8 mm)
  • Magnet Weight (oz): 40 oz. (1.13 Kg.)
  • Speaker Connector: 12 AWG compression
  • Fs (Hz): 30.5
  • Re (Ohms): 3.5
  • Le (mH): 2.10
  • Qms: 7.97
  • Qes: 0.58
  • Qts: 0.54
  • Vas (Liters): 90.4
  • Sd (cm2): 530.9
  • SPL (dB @ 1w/1m): 90
  • Xmax (mm): 7.0
  • Woofer Displacement (in): 0.10 cu.ft. (2.80 Liters)


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