RM112D4/D2

The Rockford Fosgate RM112D4 / RM112D2 is a high-performance 30 cm (12-inch) marine subwoofer from the Prime Series, designed specifically for use on boats, yachts, and in demanding outdoor and powersport applications. Thanks to its weather-resistant construction and high-quality materials, it delivers powerful, precise bass even under challenging environmental conditions.

The rugged, mineral-filled polypropylene diaphragm ensures high stability, while the UV- and salt-fog-resistant Santoprene seal guarantees reliable operation in sunlight and humidity. The moisture-resistant aramid fiber centering spider and corrosion-protected connections enhance durability.

The subwoofer features a removable, fully UV-resistant white protective cover and can be flexibly used in sealed enclosures, bass-reflex enclosures, or as an infinite baffle/free-air installation. Two impedance options allow for optimal compatibility with different amplifiers.

Product Features

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

• Specially designed for marine, boating, outdoor, and powersports applications

• Weather-resistant, marine-grade construction

• Mineral-filled, injection-molded polypropylene membrane

• UV- and salt spray-resistant Santoprene rubber seal

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

• 100% UV-resistant ASA plastic components

• Removable white protective grille with decorative ring

• Corrosion-resistant, spring-loaded speaker terminals

• Flexible, fully insulated silicone connection wires

• Dual-voice coil for flexible connection options

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

Technical Specifications

• Manufacturer: Rockford Fosgate

• Series: Prime Marine

• Model: RM112D4 / RM112D2

• Speaker Type: Marine Subwoofer

• Nominal diameter: 30 cm (12")

• RMS Power Handling: 200 watts

• Maximum power handling: 400 watts

• Voice coils: 2 (dual voice coil / DVC)

• Impedance RM112D4: 2 × 4 ohms

• Impedance RM112D2: 2 × 2 ohms

• Voice coil diameter: 50.8 mm (2")

• Voice coil construction: 4-layer

• Frequency range RM112D4: 22–250 Hz

• Frequency range RM112D2: 21–250 Hz

• Sensitivity: 88 dB (1 W / 1 m)

• Linear diaphragm stroke (Xmax): 7 mm

• Diaphragm material: Mineral-filled polypropylene

• Bead material: Santoprene

• Centering Spider: Moisture-Resistant Aramid Fiber

• Connection type: Corrosion-resistant spring-loaded terminals

• Installation depth: 122 mm

• Installation opening: 276 mm

• Outer diameter: approx. 330 mm

• Outer diameter, including decorative ring: approx. 335 mm

• Displacement: approx. 3.4 liters

• Color: White

• Protective grille: Removable, included with purchase

• Enclosure Types: Sealed, Bass-Reflex, and Infinite Baffle / Free Air
  
  

Thiele-Small parameters

RM112D4 – Dual 4 Ohms

• Resonance frequency (Fs): 29 Hz

• Total Quality (Qts): 0.64

• Equivalent air volume (Vas): 108.62 liters

• Linear diaphragm stroke (Xmax): 7 mm

• Sound pressure level (SPL): 88 dB
  

RM112D2 – Dual 2 Ohms

• Resonance frequency (Fs): 28.5 Hz

• Overall Quality (Qts): 0.59

• Equivalent air volume (Vas): 107.75 liters

• Linear diaphragm stroke (Xmax): 7 mm

• Sound pressure level (SPL): 88 dB
  
  

Connection Options

RM112D4 (2 × 4 ohms)

• Parallel connection: 2 ohms

• Series connection: 8 ohms
  

RM112D2 (2 × 2 ohms)

• Parallel connection: 1 ohm

• Series connection: 4 ohms
  
  

What's Included

• 1 × Rockford Fosgate RM112D4 or RM112D2 marine subwoofer (depending on the selected model)

• 1 × Removable white protective grille with decorative ring