12" Marine Subwoofer - Black M212S4B

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12" Marine Subwoofer - Black M212S4B

The M212S4B is a black 12” subwoofer designed for marine watercraft or powersports applications. It features a stainless steel grille is UV and moisture resistant and can be used in sealed, vented or infinite baffle installations.

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Overview Technologies Specifications Support Wiring Wizard Box Advisor
Overview

Rockford Fosgate's M2 marine grade standard takes into account the devastating effects of the outdoor environment and takes extreme measures to ensure optimum performance.

Just because you're on the water doesn't mean you have to go without bass. Put this 12" in your boat and you just may redefine "party barge!" This subwoofer is designed for free air/infinite baffle applications.

FEATURES AT A GLANCE

  • 16 gauge corrosion resistant removable Stainless Steel grille cover insert
  • True Marine Grade compliance
  • Proprietary corrosion resistant gold plated bare-wire input push-type terminals
  • UV and Salt-Fog resistant TPE (Thermo-Plastic Elastomer) surround
  • Injection molded mineral filled parabolic polypropylene cone body with UV inhibitors
  • UV stable Centrex® injection molded plastic parts
  • High temperature Kapton® former with polyimide insulated copper wire
  • Fully insulated ultra-flexible lead wire
  • Internal magnetic shielding
  • Removable trim ring/grille
  • Linear, high excursion matched motor magnetics and suspension design
  • Moisture, tear and fatigue resistant Aramid fiber spider
  • 1 Year Warranty
Technologies
CEA-2031

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

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FlexFit Basket - Marine Sub

The slot mounted frame pattern allows fine-tuning of the subwoofer's mounting position.

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VAST Surround - Marine

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

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ASTM Test Standards

Marine Grade standards ensure resistance to extreme environments.

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Specifications
Power Handling (Watts RMS)
300 Watts RMS
600 Watts Max
Size
12"
Nominal Impedance
4-Ohm
Speaker Connector
Corrossion resistant 8 AWG spring load
Mounting Depth
6.58 in. (16.72 cm)
Shipping Weight
20.1 Lbs. (9.15 Kg.)
Voice Coil Diameter
1.95" (49.53 mm)
SPL (dB @ 1w/1m)
87
Woofer Displacement
0.053 cu.ft. (1.50 Liters)
Le (mH)
0.3
Qes
0.55
Qms
9.00
Cutout Diameter
10.95 in. (27.82 cm)
CEA-2031 Compliant
CEA-2031 Guidelines
Re (Ohms)
3.10
Fs (Hz)
35
Qts
0.52
Vas (Liters)
44.3
Xmax (mm)
12.0
Sd (cm2)
510
Magnet Weight (oz)
93.6 oz. (2.65 kg.)
Compatibility
Support

Knowledge Base Articles

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Ask Our Experts

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.


Return Authorization Process



Diagnose First

Prior to requesting an RA, try to diagnose the failure. Many products we receive are sent back with No Trouble Found, usually due to incorrect installation. Use our RFTECH:Knowledge Base for troubleshooting assistance.



Contact Customer Support

Please call us during normal business hours at 1-800-669-9899 (option #1) and be prepared with the following information:

  • First and Last Name with complete Shipping Address
  • Product Name (T0D415)
  • Serial Number (12 or 13 digit number)
  • Failure Diagnosis (no output, no power LED, etc.)
  • Scanned copy of Original Receipt emailed to [email protected] (dealer name, purchase date, and item purchased must be legible)
  • Credit/Debit Card (if paying for out-of-warranty claims)
  • No money orders or checks.


Shipping Instructions

When shipping your product, your package MUST have the following information:

  • RA# Printed Outside of Box (as large as possible)
  • Copy of Original Receipt


Shipping Address

Ship your product (UPS or FedEx preferred) to the following:


Rockford/ AJR International
300 Regency DR
Glendale Heights, IL 60139
RA#:_______________________
Wiring Wizard

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

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

FAQ

Determining power needed for speakers

Prevent blowing your subwoofers

Temperature differences between subwoofer voice coil types

Differences between SVC and DVC subwoofers

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

FAQ

Determining power needed for speakers

Prevent blowing your subwoofers

Temperature differences between subwoofer voice coil types

Differences between SVC and DVC subwoofers

Box Advisor
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