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Prime Marine 30 cm (12") DVC 2 + 2-Ohm Subwoofer - Black

The RM112D2B is a black 30 cm (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.






  • 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


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

Element Ready™ - Subwoofers

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

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).

Klippel Verified

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

VAST Surround - Marine

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

ASTM Test Standards

Marine Grade standards ensure resistance to extreme environments.

FlexFit Basket - Marine Sub

The slot mounted frame pattern allows fine-tuning of the subwoofer's mounting position.

Power Handling

Nominal Impedance

Basket Size

Voice Coil Diameter

Speaker Connector

Cutout Diameter

Mounting Depth

200 Watts RMS

400 Watts Max


30 cm (12")

54 mm (2") aluminum

Dual 12 AWG compression

276 mm

122 mm

Vas (Liters)

Fs (Hz)


Sd (cm2)

SPL (dB @ 1w/1m)

Xmax (mm)







Knowledge Base Articles


Owner's manual: