M1D4-8B

Marine Tested: Rockford Fosgate uses industry standard tests (ASTM B117 salt/fog and ASTM G154 UV) to ensure the M1D4-8B subwoofers are durable in the difficult marine environment.

Impedance Switch: A switch on the input terminal allows you to easily change the subwoofer's impedance between 2Ω and 8Ω, internally changing between wiring the dual 4Ω voice coils in parallel and in series. (The connected amplifier should be off when changing the impedance.) The power handling is the same for either setting; 150 watts RMS/600 watts peak.

LEDs: There are red, green, and blue LEDs on the back of the grille to create a glow on the woofer cone. The LEDs can be powered individually, or in any combination you like. Depending on what combination of LED wires is connected, they light red, green, blue, yellow, pink, aqua, or white. A 12 volt power supply is needed to turn the LEDs on and a 1-amp fuse should be added in-line (fuse not included). The LEDs can also be controlled using Rockford Fosgate's LED Controller (item number 575PMXRGB, sold separately). An LED power wire harness is included with a 4-pin waterproof Deutsch DT Series connector that plugs into the subwoofer frame.

• 8" marine subwoofer with dual 4-ohm voice coils
• injection-molded mineral-filled polypropylene cone with Santoprene rubber surround
• integrated Color Optix RGB LED lighting included (requires separate PMX-RGB lighting controller)
• synthetic fiber blend spider
• Element Ready™ design
  • rugged, UV-stable plastic parts
  • corrosion-resistant spring-loaded push terminals
  • IP67 certification
• removable grille included
• power handling: 150 watts RMS/600 watts peak
• sensitivity: 87.5 dB
• selectable impedance: 2 or 8 ohms
• cutout diameter: 7.12"
• top-mount depth: 3.51"
• warranty: 2 years
• 60-day returns
• MFR # M1D4-8B

Rockford Fosgate M1D4-8B owner's manual