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Prime 8" Dual 4-Ohm Subwoofer - Black RM18D4B

Prime 8" Dual 4-Ohm Subwoofer - Black RM18D4B

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.

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$129.99
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Overview

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
  • Available in black or white
  • 2 Year Warranty
Technologies
Element Ready™ - Subwoofers
Element Ready™ - Subwoofers

These subwoofers are protected against Dust, UV, Water, Corrosion, and feature Stainless hardware.

CEA-2031
CEA-2031

Power handling on Rockford Fosgate speakers conform to CEA-2031 industry standards.

Klippel Verified
Klippel Verified

Klippel is a speaker certification program allowing us to deliver the best possible subwoofers.

ASTM Test Standards
ASTM Test Standards

Marine Grade standards ensure resistance to extreme environments.

VAST Surround - Marine
VAST Surround - Marine

The Vertical Attach Surround Technique significantly increases a subwoofer's effective radiating cone area up to 25%.

FlexFit 2 Basket - Marine Sub
FlexFit 2 Basket - Marine Sub

The slot mounted frame pattern allows for variable adjustments to the mounting position of the subwoofer.

Anodized Aluminum Voice Coil Former
Anodized Aluminum Voice Coil Former

Rockford Fosgate subwoofers use anodized aluminum voice coil formers for superior heat dissipation (up to 100° ...

Specifications
Nominal Impedance
Dual 4-Ohm
Magnet Weight (oz)
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
SPL (dB @ 1w/1m)
85
Qes
0.89
Vas (Liters)
19.0
Size
8"
Power Handling (Watts RMS)
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
CEA-2031 Guidelines
Xmax (mm)
7.0
Re (Ohms)
6.3
Le (mH)
2.48
Sd (cm2)
277
Support

Return Authorization

Contact the Authorized Rockford Fosgate Dealer you purchased this product from. If you need further assistance, call 1-800-669-9899 for Rockford Customer Service. You must obtain an RA# (Return Authorization number) to return any product to Rockford Fosgate. You are responsible for shipment of product to Rockford.


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