Prime 12" Dual 4-Ohm Subwoofer Black

The RM112D4B is a black 12” 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 Years Standard Warranty warranty info
USD 149.99

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The RM112D4B is a black 12” subwoofer designed with weatherproofing technology specific for use in marine watercraft or powersports applications. It features a color molded grille that is 100% UV stable. This model can be used in sealed, vented or infinite baffle installations.
Element Ready™ - Subwoofers

Element Ready™ - Subwoofers

These subwoofers are protected against Dust, UV, Water, Corrosion, and feature Stainless hardware.
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Power handling on Rockford Fosgate speakers conform to CEA-2031 industry standards.
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Klippel Verified

Klippel Verified

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

ASTM Test Standards

Marine Grade standards ensure resistance to extreme environments.
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VAST Surround - Marine

VAST Surround - Marine

The Vertical Attach Surround Technique significantly increases a subwoofer's effective radiating...
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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...
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Anodized Aluminum Voice Coil Former

Anodized Aluminum Voice Coil Former

Rockford Fosgate subwoofers use anodized aluminum voice coil formers for superior heat dissipation...
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CEA-2031 Compliant: CEA-2031 Guidelines
Size: 12"
Power Handling (Watts RMS): 200 Watts RMS
400 Watts Max
Nominal Impedance: Dual 4-Ohm
Voice Coil Diameter: 2" aluminum
Magnet Weight (oz): 39.75 oz. (1.13 Kg)
Speaker Connector: Dual 12 AWG compression
Fs (Hz): 28.5
Re (Ohms): 3.7
Le (mH): 3.56
Qms: 10.06
Qes: 0.62
Qts: 0.59
Vas (Liters): 107.7
Sd (cm2): 585
SPL (dB @ 1w/1m): 89
Xmax (mm): 7.0
Woofer Displacement: 0.12 cu. ft. (3.49 Liters)
Cutout Diameter: 10.87 in. (276 mm)
Mounting Depth: 4.81 in. (122 mm)
Shipping Weight:

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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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12 AWG Speaker Wire Packaged 15 Foot Black/Silver
MSRP $24.99

Rockford FosgateWoofer WiringWizard

Available Wiring Diagrams

Please consult your amplifier owner's manual for lowest recommended impedance.

Wiring Diagram #1

Wiring Diagram #2

Wiring Diagram #3

Wiring Diagram #4

Wiring Diagram #5

Wiring Diagram #6

Wiring Diagram #7

Wiring Diagram #8

Wiring Diagram #9

Speaker Polarity
Your woofer may use one of the following to identify (+/-) terminals.
Positive +
Red Post
Purple (4Ω)
Red (8Ω)
Negative -
Black Post
No Dot
No Dot

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