ROCKFORD FOSGATE RM18D4 - Prime Marine Dual 4-Ohm Subwoofer (300 W / 20 cm / 8" / white)

Article number: 11006825
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    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
    Removable trim ring/grille
    Ultra-flexible fully insulated silicone lead wire
    Proprietary corrosion resistant spring loaded push terminals
    Moisture, tear and fatigue resistant Aramid fiber spider

Description of Article:

The Rockford Fosgate RM marine grade standard takes into account the devastating effects of the outdoor environment and takes extreme measures to ensure optimum performance.

The Marine RM full-range speakers are perfect for anyone looking to add some FANATIC sound to their vessel, and will always sound great when listening to your music at the dock or while tearing up the waves at full throttle.

The RM18D4 is a white 8” 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.


Power handling on Rockford Fosgate speakers conform to CEA-2031 industry standards. This means your speaker has the capacity to handle power under continuous demand, not instantaneous power handling that over time can damage voice coils.

Vertical Attach Suround Technique (U.S. Patent (Patent Pending))

Rockford’s proprietary surround technique,VAST, provides up to a 25% increase in the speakers effective radiating cone area without complicated installation issues. This design alters the typical design and manufacturing technique by eliminating the large flat glue surface area (the landing) which allows the surround to be shifted for increased cone area. In turn, both nominal efficiency and maximum output capabilities are dramatically improved.

flex fit 2

The slot mounted frame pattern of the FlexFit 2 basket utilizes slots (where feasible) instead of single screw sized holes. This allows slight adjustment of the speaker when mounted.

Technische Daten / Technical Data

Größe / Size: 20 cm / 8"
Nennimpedanz / Nominal Impedance: Dual 4-Ohm
Voice-Coil Durchmesser / Voice Coil Diameter: 3,81cm Aluminium / 1.5" aluminum
Belastbarkeit / Power Handling: 150 Watts RMS
300 Watts Max
Magnetgewicht / Magnet Weight : 0,50 Kg / 17.72 oz.
Lautsprecheranschluss / Speaker Connector : Dual 12 AWG compression
Woofer Verschiebung / Woofer Displacement : 1.41 Liters
Durchmesser Ausschnitt / Cutout Diameter : 177 mm / 7.0"
Einbautiefe / Mounting Depth : 91.7 mm / 3.6 in.

Scope of Delivery:

  • 1 x Marine RM18D4 Subwoofer
  • 1 x Grille
  • 1 x installation manual (EN)

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