For screen reader problems with this website, please call580-765-64885 8 0 7 6 5 6 4 8 8Standard carrier rates apply to texts.

Rockford Fosgate® Prime Black 12" Dual 2-Ohm Subwoofer

Model #: RM112D2B
Rockford Fosgate
At a Glance
The RM12D2B is a black 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.
Call for Best Price
$99,999.00Save $NaN

Get to know this product.

The RM112D2B is a black 12” subwoofer designed with weatherproofing technology specific for use in marine watercraft or powersports applications. It features a color molded grille that is 100% UV stable. This model can be used in sealed, vented or infinite baffle installations.

  • True Marine Grade compliance
  • 100% UV stable ASA injection molded plastic parts
  • Injection molded mineral filled polypropylene cone body with UV inhibitors
  • UV and Salt-Fog Resistant Santoprene surround
  • 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
  • Available in black or white
  • 2-Year Warranty


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

VAST Surround - Marine

The Vertical Attach Surround Technique significantly increases a subwoofer's effective radiating cone area up to 25%.

Klippel Verified

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

Element Ready™ - Subwoofers

These subwoofers are protected against Dust, UV, Water, Corrosion, and feature Stainless hardware.

ASTM Test Standards

Marine Grade standards ensure resistance to extreme environments.

Anodized Aluminum Voice Coil Former

Rockford Fosgate subwoofers use anodized aluminum voice coil formers for superior heat dissipation (up to 100° at full power levels).

FlexFit 2 Basket - Marine Sub

The slot mounted frame pattern allows for variable adjustments to the mounting position of the subwoofer.

Useful Documents


Nominal ImpedanceDual 2-Ohm
Le (mH)2.17
Re (Ohms)3.7
Cutout Diameter10.87 in. (276 mm)
Power Handling (Watts RMS)200 Watts RMS, 400 Watts Max
Magnet Weight (oz)39.75 oz. (1.13 Kg)
Speaker ConnectorDual 12 AWG compression
Mounting Depth4.81 in. (122 mm)
SPL (dB @ 1w/1m)89
CEA-2031 CompliantCEA-2031 Guidelines
Fs (Hz)28.5
Vas (Liters)107.7
Xmax (mm)7
Woofer Displacement0.12 cu. ft. (3.49 Liters)
Sd (cm2)585
Voice Coil Diameter2" aluminum

Misc. Specs

Woofer Size12"
Mount Depth4.81
Manufacturer Warranty2 Year
RMS Power Handling (Watts)200
Peak Power Rating (Watts)400
Subwoofer Size12"
Shallow MountNo
WarningProposition 65 Warning for California Residents