Garage
Shop

See all parts that fit your 1980 Starfire

Rockford Fosgate M212S4B (Black)

12" Single 4 ohm Marine M2 Series Subwoofer

Product videos
highlight-star-icon

• 600 watts Peak
• 300 watts RMS
• Single 4 ohm Voice Coil
• Polypropylene Cone
• Thermo-Plastic Elastomer Surround
• Kapton® Former
• Magnetic Shielding
• Black

Learn more about the m212s4b

Good news and a little bad...

This item has been discontinued

But you may be interested in the newest model that's available.

pm212s4b thumbnail

Rockford Fosgate PM212S4B

OUR PRICE: $369.99

View item

Loading...
Club 522F main

JBL Club 522F (SPKCB522FAM)

270W Peak (90W RMS) 5.25" Club Series 2 Way Coaxial 3-ohm Speakers

-42.29%

$74.99

List price $129.95

Reference 5030cx main

Infinity Reference 5030cx (REF5030CX)

390W Peak (130W RMS) 5.25" Reference Series 2-Way 3-ohm Component Speaker System

2
-60.01%

$99.95

List price $249.95

Limited time!
KFC-415C main

Kenwood KFC-415C

320W Peak (80W RMS) 4x10" Performance Series 2-Way Coaxial 4-ohm Car Speakers

25
-45.00%

$99.00

List price $180.00

REF507CF main

Infinity REF507CF (INFSPKRF507CFUS)

390W Peak (130W RMS) 5.25" Reference Series 2-Way 3-ohm Component Speaker System

-12.00%

$219.95

List price $249.95

DMDX5 main

Diamond Audio DMDX5

240W Peak (80W RMS) 5" DMD Series 2-Way Cocentric Coaxial 4-ohm Speakers

H410 main

Cerwin-Vega H410

420W Peak (140W RMS) 4x10" Vega Series 2-Way Coaxial 4-ohm Speakers

-16.67%

$99.99

List price $119.99

Limited time!
46CSC54 main

Kicker CSC5 (46CSC54)

450W Peak (150W RMS) 5.25” CS Series 2 Way Coaxial 4-ohm Speakers

5
-33.36%

$79.96

List price $119.99

43DSC504 main

Kicker DSC50 (43DSC504)

400W Peak (100W RMS) 5.25" DS Series 2-way 4-ohm Coaxial Car Speakers (DSC504)

17
-11.77%

$74.99

List price $84.99

VSP525KIT main

NVX VSP525KIT

750W Peak (250W RMS) 5.25" V-Series 2 Way Component Car Speakers

27
-16.67%

$99.99

List price $119.99

VSP525 main

NVX VSP525

480W Peak (160W RMS) 5.25" V-Series 2 Way Coaxial Car Speakers

23
-16.67%

$79.99

List price $95.99

Product Highlights


• 600 watts Peak
• 300 watts RMS
• Single 4 ohm Voice Coil
• Polypropylene Cone
• Thermo-Plastic Elastomer Surround
• Kapton® Former
• Magnetic Shielding
• Black

Description


Rockford Fosgate brand icon

Authorized dealer

Improving Sound Waves While Riding the Waves

Being on a boat can be pretty loud with the sound of the motor running and other boaters within your vicinity making noise. So you buy some speakers and they sound great but you really can't make out any of the bass coming from you audio source. Lucky for you Rockfod Fosgate has the perfect solution to your problem. This 12", marine rated, M2 series subwoofer is rated at 300 watts RMS which will vastly improve the bass output in your audio system. The woofer is equipped with an injection molded mineral filled parabolic polypropylene cone for rigidity and improved performance. The UV and salt-fog resistant TPE surround is built to take the harsh environments of the sun and ocean giving your subwoofer longevity. The sleek black finish makes it compatible with just about any boat interior, while its speaker grille adds some protection from possible objects rolling around the deck. Don't let your audio system go to waste with weak bass, Rockford Fosgate's M212S4B is the perfect way to add some bass that is enjoyable, crisps, clear, and responsive.

  • 12" Single 4 ohm Marine M2 Series Subwoofer
  • Power Handling:
    • Peak: 600 watts
    • RMS: 300 watts
  • Impedance: 4 ohm
  • Injection molded mineral filled parabolic polypropylene cone
  • UV and Salt-Fog resistant TPE (Thermo-Plastic Elastomer) surround
  • High temperature Kapton® former with polyimide insulated copper wire
  • Internal magnetic shielding for reduced electromagnetic interference potential
  • 2" Voice coil
  • Linear, high excursion matched motor magnetics and suspension design
  • Frequency response: 30-250 Hz
  • Sensitivity: 87 dB
  • Color is Black
  • Also available in: White
  • 1-year SonicElectronix.com warranty

Product history:

Rockford Fosgate PM212S4B thumbnail
(newest, current model)
Rockford Fosgate M212S4B thumbnail
(previous model, replaced by Rockford Fosgate PM212S4B)

Subwoofer Wiring Guide


Wiring Guide to Wire 1 Rockford Fosgate M212S4B (Black) Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 Rockford Fosgate M212S4B (Black) Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

Wiring Guide to Wire 3 Rockford Fosgate M212S4B (Black) Subwoofers

4 Channel Amp

Wiring Guide to Wire 4 Rockford Fosgate M212S4B (Black) Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp


Best selling similar products

Marine Club 12 small

JBL CB122 Club Marine 12

• Peak Power: 1200 watts
• RMS Power: 400 watts
• Polypropylene Cone
• Rubber Surround
• Impedance: Single 4 ohm
• Mount depth: 7-13/16"
• Sensitivity: 89 dB

(1)

$119.95

List price $379.95

JBLMARSUBSD102GAM small

JBL Stadium Marine 102 (JBLSUBMASD10AM)

• Peak Power: 900 watts
• RMS Power: 300 watts
• Impedance: 2 or 4 ohm
• Multi-color RGB LED lights
• Plus One Polypropylene Cone
• Rubber Surround
• Mount depth: 4-7/8"
• Sensitivity: 89 dB

$149.95

List price $449.95

STADIUMMW1000AM small

JBL Stadium Marine MW1000 (MW1000AM)

• RMS: 300 Watts / Peak: 900 Watts
• Plus One cones provide more overall speaker-cone area than other cones in its class
• Unique and eye-catching RGB illumination
• Features SSI (Switch-Selectable Impedance), which allows you to choose either 2 or 4 ohm load impedance
• Durable One-piece Polymer basket

$124.49

List price $449.95

Specifications & Details


Subwoofer Specifications
Subwoofer Size
12"
Peak Power Handling
600 watts
RMS Power Handling
300 watts
Voice Coil(s)
Single
Impedance (Per Voice Coil)
4 ohm
Frequency Response
30 - 250 Hz
Sensitivity
87 dB
Xmax (millimeters)
12 mm
Subwoofer Design
Round / Circle
Main Cone Color
Black
Woofer Composition
Polypropylene
Woofer Surround
Thermo-Plastic Elastomer
Subwoofer Grille
Yes - Included
Re-Cone Kit Available
No
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Sealed
Top-Mount Depth (Mounting Depth)
6-5/8"
Cutout Diameter
11"
Shallow Mount Installation
No
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

M212S4B

Weight:

20.00lbs

Internal SKU:

m212s4b

Internal Product ID:

15641

Product and How-to Videos


Customer Ratings & Reviews


Rockford Fosgate M212S4B (Black) thumbnail image

5 star
50%
4 star
50%
3 star
0%
2 star
0%
1 star
0%



Durability
4.5
Value
5
Features
4.5
Design
5
Usability
4.5

Customer Reviews

Sort by:

Loading...

Just what I ordered - Great Price

I found exactly what I needed at an unbeatable price.
Thank you!

By Alexandre on January 30, 2013

16 found this helpful


RF M212

This Sub is a good product. I would not say that it is great but far better than average. It has a great deal of reverb but you can try to adjust most of that out of it with the amp. As far as marine stereo equipment goes I would put it at the top but in the end, it still is no JL Audio.

By Brian on January 27, 2014

12 found this helpful



Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

1977 Dodge Ramcharger

1980 Oldsmobile Starfire

1995 Mazda B2300

2006 Dodge Grand Caravan

1990 Mitsubishi Sigma

2019 BMW 4 Series

1991 BMW 325i

1983 GMC C2500 Suburban

2024 Ford Maverick

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.