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Rockford Fosgate

Rockford Fosgate 12" Prime 4-Ohm Car Subwoofer - R1S4-12

Abt Model: R1S412 | UPC Code: 780687329297
 Discontinued Product This item is no longer available from our website.
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Rockford Fosgate - R1S4-12 - Car Subwoofers
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150 Watts RMS/ 300 Watts Max Power Handling/ Anodized Aluminum Voice Coil Former/ Parabolic Polypropylene Cone/ 12 AWG Compression Terminals/ Stamped Steel Basket/ Single Voice Coil Design/ Optimized For Sealed Enclosures/ Black Finish
Discontinued (details)
Your Shipping Zip Code: 20149 (change)

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Product Details

Rockford Fosgate 12" Prime 4-Ohm Car Subwoofer - R1S412

Rockford Fosgate Prime 12” subwoofers provide high performance bass at an unbelievable value. The R1S412 features a Single Voice Coil design, 150 Watt RMS power handling, and work great in sealed enclosures.


  • Anodized aluminum voice coil former
  • Parabolic polypropylene cone
  • 12 AWG compression terminals
  • Stamped steel basket
  • Single voice coil design
  • Optimized for sealed enclosures


  • Size: 12"
  • Nominal Impedance: 4-Ohm
  • Power Handling (Watts RMS):
    • 150 Watts RMS
    • 300 Watts Max
  • Voice Coil Diameter: 2.0" (4-Layer)
  • Magnet Weight (oz): 51.57 oz. (1.46 Kg.)
  • Speaker Connector: 12 AWG compression
  • Fs (Hz): 22
  • Re (Ohms): 3.39
  • Le (mH): 2.2
  • Qms: 4.76
  • Qes: 0.55
  • Qts: 0.49
  • Vas (Liters): 197.2
  • Sd (cm2): 530
  • SPL (dB @ 1w/1m): 87
  • Xmax (mm): 6.3
  • Woofer Displacement (in): 0.101 cu. ft. (2.86 Liters)

Approximate Dimensions:

  • Cutout Diameter (in): 10.94 in
  • Mounting Depth (in): 5.00 in.

Approximate Weight:

  • Shipping: 9.5 lbs

Warranty Information:

  • Manufacturer Warranty (authorized online retailer): One Year Parts & Labor
More reasons to buy the Rockford Fosgate R1S4-12 from Abt Electronics
  • is an authorized dealer (Learn More).
  • The Rockford Fosgate R1S4-12 is Brand New.
  • The Rockford Fosgate R1S4-12 Ships in a Factory Sealed Box.
  • Abt ships this product for free!
Rockford Fosgate 12" Prime 4-Ohm Car Subwoofer

Rockford Fosgate 12" Prime 4-Ohm Car Subwoofer


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