Rockford Fosgate RM18D4B 8" 150W RMS Dual 4-Ohm Prime R1 Marine Subwoofer (Black)

The RM18D4B is a black 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.

• 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

Specifications:

• Nominal Impedance: Dual 4-Ohm
• Magnet Weight: 17.72 oz. (0.50 Kg)
• Voice Coil Diameter: 1.5" aluminum
• Speaker Connector: Dual 12 AWG compression
• Mounting Depth: 3.6 in. (91.7 mm)
• Shipping Weight: 5.4 lbs
• SPL (dB @ 1w/1m): 85 dB
• Qes: 0.89
• Vas (Liters): 19.0
• Size: 8"
• Power Handling
• 150 Watts RMS
• 300 Watts Max
• Fs (Hz): 41.5
• Qts: 0.81
• Qms: 8.48
• Cutout Diameter: 7.0 in. (177 mm)
• Woofer Displacement: 0.05 cu. ft. (1.41 Liters)
• CEA-2031 Compliant
• Xmax (mm): 7.0
• Re (Ohms): 6.3
• Le (mH): 2.48
• Sd (cm2): 277