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The Rockford Fosgate M1D4-8 Color Optix™ is an 8" dual-voice-coil (DVC) 4‑Ohm marine subwoofer that combines loud, accurate bass with Color Optix lighting compatibility. It’s sold individually and built for marine environments.
Buyer confidence
88%Highlights
- 2-Year Warranty
- 100% UV Stable ASA plastic frame & grille design stands up to harsh marine environment
- VAST vertical attach surround technique increases effective radiating cone area up to 25%
- Vented motor design with water-repelling nano coated mesh screen
Key specs
Full specs- Size
- 8"
- Voice Coil Type
- Dual Voice Coil
- Le (mH)
- 1.70
- Fs (Hz)
- 44.5
- Nominal Impedance (Ohms)
- 2-Ohm or 8-Ohm Switchable
- Qts
- 0.90
- Vas (Liters)
- 15.7
- Xmax (mm)
- 7.0
Key specs
Full specs- Size
- 8"
- Voice Coil Type
- Dual Voice Coil
- Le (mH)
- 1.70
- Fs (Hz)
- 44.5
Highlights
Overview- 2-Year Warranty
- 100% UV Stable ASA plastic frame & grille design stands up to harsh marine environment
- VAST vertical attach surround technique increases effective radiating cone area up to 25%
Overview
The Rockford Fosgate M1D4-8 Color Optix™ is an 8" dual-voice-coil (DVC) 4‑Ohm marine subwoofer that combines loud, accurate bass with Color Optix lighting compatibility. It’s sold individually and built for marine environments.
Best for
- Boat owners who want compact, high‑quality bass
- Marine audio systems needing weather‑resistant components
- Installers and builders who want plug‑and‑play lighting control
- Systems that benefit from selectable impedance for flexible wiring
Key points
- 8" dual‑voice‑coil (DVC) 4‑Ohm driver
- Color Optix™ lighting support — requires PMX‑RGB controller and RF Connect app (controller sold separately)
- Element Ready™ design for resistance to water, salt, and UV exposure
- IP67 water intrusion rating
- Integrated Deutsch™ / Amphenol™ connectors for marine plug‑and‑play connectivity
- VersaSwitch™ to change impedance between 2 and 8 ohms
Fit and use
Designed specifically for marine audio systems, the M1D4-8 pairs with Rockford Fosgate’s Color Optix controller and RF Connect app through its integrated Deutsch/Amphenol connectors for lighting control. Use the VersaSwitch™ to match system impedance without rewiring. Confirm system compatibility (enclosure, amplifier, and wiring) before installation.
What to know
Color Optix lighting requires the PMX‑RGB controller and the RF Connect app (controller sold separately). Element Ready™ construction and IP67 rating indicate strong environmental protection but do not eliminate the need for proper marine installation and maintenance. The subwoofer is sold individually; verify impedan…
Highlights
Key features
- 2-Year Warranty
- 100% UV Stable ASA plastic frame & grille design stands up to harsh marine environment
- VAST vertical attach surround technique increases effective radiating cone area up to 25%
- Vented motor design with water-repelling nano coated mesh screen
- Fully insulated silicone tinsel leads
- Ultra-bright wide-angle RGB LEDs provide rich, reliable illumination
- 1.5" (39mm) High Temp Kapton™ Woofer Voice Coil Former
- Industry’s first molded in-frame connectors for simple connectivity in addition to conventional spade terminals
- Integrated Deutsch™/Amphenol™ connectors make wiring connections simple and error proof
- VERSA impedance switch quickly allows series or parallel configuration without additional wiring
- Zinc Nickel-plated Marine grade brass connection terminals
- Linear Synthetic Fiber Blend Spiders
More info
Manufacturer details
The M1D4-8 Color Optix™ 8” DVC 4-Ohm subwoofers deliver loud, clear, accurate bass, and light the way for your journey! Sold individually (1 each).
Color Optix™: Adjust your own bright, wide, and limitless lighting experience with the Rockford Fosgate Color Optix™ plug-and-play controller (sold separately) and App.
Element Ready™: Purpose Built for the Marine Environment, Rockford’s Element Ready™ products are built to stand up to Water, Salt, and UV rays, making sure your subwoofers stand the test of time.
True Marine Ecosystem: Integrated Deutsch™ / Amphenol™ connections provide industry leading marine plug-and-play connectivity and flexible install options.
Color Optix™: Requires PMX-RGB controller and RF Connect™ App
Color Optix™ Speakers | Launch
Color Optix™ Speakers | Overview
Color Optix™ Controller | Overview
Additional details
The M1 series of Element Ready™ subwoofers are designed to pair with the Rockford Fosgate Color Optix™ Controller and RF Connect App through its Deutsch™ and Amphenol™ connectors integrated into the basket. This combined with their IP67 certification make these speakers Element Ready™ and truly purpose built for marine applications. To compliment the plug and play connectivity and streamline installation, M1 subwoofers are equipped with a VersaSwitch™ to make changing impedance between 2 and 8 ohms as easy as flipping a switch.
Technologies
Element Ready™ | Speakers
All components are protected against harsh outdoor elements like Dust, UV, Temperature, Water, Corrosion &
ASTM B117 Testing
ASTM B117 500Hr Salt/Fog Testing Standards
Klippel Verified
To adorn the ‘Verified with Klippel’ mark, the qualifying company’s loudspeaker engineering personnel must be
ASTM G154 Testing
ASTM G154 500Hr Accelerated UV testing
IPX6 Water Intrusion Rated
A device with a level 6 water resistance rating can survive strong water jets projected by a 12.5mm nozzle at any
ISO60068-2-64 Vibration Testing
ISO60068-2-64 Vibration testing standards ensure the product is durable and can withstand vibrations found on
VAST Surround - Marine
Rockford Fosgate's proprietary surround technique, VAST, provides up to a 25% increase in the speakers effective
VERSA Switch
Allows you to easily configure a 2Ω Dual Voice Coil subwoofer into 1Ω / 4Ω or a 4Ω DVC sub into 2Ω / 8Ω with the
Specs
Specifications
22
| Size | 8" |
| Voice Coil Type | Dual Voice Coil |
| Le (mH) | 1.70 |
| Fs (Hz) | 44.5 |
| Nominal Impedance (Ohms) | 2-Ohm or 8-Ohm Switchable |
| Qts | 0.90 |
| Vas (Liters) | 15.7 |
| Xmax (mm) | 7.0 |
| Re (Ohms) | 6.3 |
| SPL (dB @ 1w/1m) | 87.5 |
| Sd (cm2) | 227 |
| Sd (cm2) | 227 |
| Woofer Displacement | 0.05 cu. ft. (1.41 Liters) |
| Mounting Depth | 3.43 in. (87.1 mm) |
| Cutout Diameter | 7.10 in. (180.4 mm) |
| Qes | 0.79 |
| Qms | 9.2 |
| Power Handling (Watts RMS) | 150 Watts RMS 600 Watts PEAK |
| Magnet Weight (oz) | 17.72 oz. (0.50 Kg) |
| Voice Coil Diameter | 1.5" (38.6 mm) |
| Speaker Connector | Deutsch™ |
| Shipping Weight | 4.6 Lbs. (2.10 Kg) |
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Installation resources
Wiring diagrams
9
Wiring Diagram #1
Source: Rockford Fosgate
Wiring Diagram #2
Source: Rockford Fosgate
Wiring Diagram #3
Source: Rockford Fosgate
Wiring Diagram #4
Source: Rockford Fosgate
Wiring Diagram #5
Source: Rockford Fosgate
Wiring Diagram #6
Source: Rockford Fosgate
Wiring Diagram #7
Source: Rockford Fosgate
Wiring Diagram #8
Source: Rockford Fosgate
Wiring Diagram #9
Source: Rockford Fosgate
Support
Return Authorization
If you bought this product from Onkar Electronics, use the Contact Us page on the Onkar Electronics website and we will help with return authorization and warranty support. If you purchased it from another dealer, contact that authorized dealer first for return assistance.
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