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Rockford Fosgate RM112D4B

400W 12" Prime R1 Series Dual 4-ohm Marine Subwoofer

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Rockford Fosgate RM112D4B

400W 12" Prime R1 Series Dual 4-ohm Marine Subwoofer


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Rockford Fosgate RM112D4B

Rockford Fosgate RM112D4B - 12" Prime R1 Series Marine Subwoofer

The RM112D4B subwoofer is a 12" Prime R1 subwoofer designed for marine watercraft or powersports applications. It features color matched grille and is UV and moisture resistant. Can be used in sealed, vented or infinite baffle installations. Its CEA-2031 Compliant 200 watts RMS is a perfect fit for a wide range of audio applications especially those that require the capacity to handle power under continuous demand.

UV Inhibitor Materials

Make Mother Nature Shake

Rockford Fosgate engineered the RM112D4B to provide modest power, but enough power to get any party going. With a 2" 4-layer aluminum voice coil, Santoprene surround, and Moisture, tear and fatigue resistant Aramid fiber spider this driver is built to get Mother Nature moving. In addition The driver is Klippel Verified, which means Rockford Fosgate has made the investment to deliver the best possible subwoofers to their customers.

Element Ready

Element Ready

Rockford Fosgate knows that when you shop for speakers for your boat, UTV or motorcycle, you are looking for something that is not only going to sound amazing but stand up to the elements. The driver is equipped with 100% UV stable ASA injection molded plastic parts, including Injection molded mineral filled polypropylene cone body with UV inhibitors and UV and salt fog resistant surround to keep your rocking in even the most daunting surroundings.

General Features:

  • 12" Prime R1 Series Dual 4-ohm Marine Subwoofer
  • Power Handling:
    • Peak: 400 watts
    • RMS: 200 watts
  • CEA-2031 compliant
  • Klippel Verified
  • Injection molded mineral filled polypropylene cone
  • UV and salt fog resistant Santoprene surround
  • 2" 4-layer aluminum voice coil
  • True Marine Grade compliance
  • 100% UV stable ASA injection molded plastic parts
  • Ultra-flexible fully insulated silicone lead wire
  • Proprietary corrosion resistant spring loaded push terminals
  • Moisture, tear and fatigue resistant Aramid fiber spider
  • Removable trim ring/grille included
  • Dual 12 gauge compression terminals
  • Top-mount depth: 4.81"
  • Cutout diameter: 10.87"
  • Frequency Response: 22 - 250 Hz
  • Fs: 29 Hz
  • Qts: 0.64
  • Vas: 3.83 ft³
  • Xmas: 7.0 mm
  • Sensitivity: 88 dB
  • Optimum Sealed Enclosure: 1.65 ft³
  • Optimum Ported Enclosure: 2.45 ft³
  • Infinite Baffle Compatible
  • Also available in Wnite: Rockford Fosgate RM112D4
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

  • Priced Individually

Check out the Rockford Fosgate RM112D4B Owner's Manual

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Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Rockford Fosgate RM112D4B