RM112D2B

The Rockford Fosgate RM112D2B is a high-performance 30 cm (12-inch) marine subwoofer from the Prime Series, designed specifically for use on boats, watercraft, and in powersports applications. Thanks to its weather-resistant construction, UV-resistant materials, and corrosion-protected components, it delivers reliable bass reproduction even under demanding environmental conditions.

The mineral-reinforced polypropylene diaphragm, combined with the durable Santoprene surround, ensures a robust and long-lasting design. The moisture-resistant aramid fiber suspension and the flexible, fully insulated silicone leads ensure reliable operation. The removable black protective grille, featuring UV-resistant ASA plastic components, protects the subwoofer and provides a discreet appearance.

With its 2 + 2-ohm dual voice coil, a power handling capacity of 200 watts RMS, and flexible mounting options, the RM112D2B is suitable for both sealed and bass-reflex enclosures as well as free-air installations (infinite baffle).

Product Features

• 30 cm (12") marine subwoofer from the Rockford Fosgate Prime Series

• Weather-resistant, marine-grade construction

• 100% UV-resistant ASA plastic components

• Mineral-reinforced polypropylene membrane

• UV- and salt spray-resistant Santoprene bead

• Moisture-, tear-, and fatigue-resistant aramid fiber centering spider

• Highly flexible, fully insulated silicone supply cables

• Corrosion-Resistant Spring-Loaded Terminal Blocks

• Removable black trim ring with protective grille

• Suitable for sealed enclosures, bass-reflex enclosures, and infinite baffle mounting

• Ideal for boats, watercraft, and powersports applications
  
  

Technical Specifications

• Manufacturer: Rockford Fosgate

• Model: RM112D2B

• Series: Prime Marine

• Product Type: Marine Subwoofer

• Nominal diameter: 30 cm (12 inches)

• Color: Black

• RMS Power Handling: 200 watts

• Maximum power handling: 400 watts

• Impedance: 2 + 2 ohms (dual voice coil)

• Total impedance in a parallel connection: 1 ohm

• Total impedance in series connection: 4 ohms

• Voice coil diameter: 50.8 mm (2 inches)

• Voice coil construction: 4-layer

• Frequency range: 21–250 Hz

• Efficiency (1 W/1 m): 88 dB

• Resonance frequency (Fs): 28.5 Hz

• Overall Quality (Qts): 0.59

• Equivalent volume (Vas): 107.75 liters

• Linear diaphragm stroke (Xmax): ±7 mm

• Displacement: approx. 3.4 liters

• Diaphragm material: Mineral-reinforced polypropylene

• Bead material: Santoprene

• Centering spider: aramid fiber

• Connection type: Corrosion-protected spring-loaded terminals

• Installation diameter: 276 mm

• Installation depth: 122 mm

• Enclosure Types: Sealed, Bass-Reflex, or Infinite Baffle

• Applications: Marine and Powersports
  
  

What's Included

• 1 × Rockford Fosgate RM112D2B Marine Subwoofer

• 1 × Removable black protective grille with decorative ring

• Installation hardware

• Installation and Operating Instructions