Rockford Fosgate M1D2-8B M1 8" DVC 2Ω Color Optix Marine Subwoofer - Black

Rockford Fosgate M1D2-8B M1 Series 8 Inch DVC 2-Ohm Color Optix Marine Subwoofer in Black

A marine grade 8 inch dual voice coil 2-ohm subwoofer in black with Color Optix RGB LED lighting, 150W RMS handling, and VersaSwitch impedance selection between 1-ohm and 4-ohm. Santoprene VAST surround, mineral-filled polypropylene cone, vented motor with nano-coated mesh screen, and integrated Deutsch/Amphenol plug-and-play connectors. Ultra-shallow 3.43 inch mounting depth suited to very space-constrained installations. IPX6 rated and ASTM B117 and G154 tested. Sold individually (1 each). Backed by a 2 year warranty.

Product Overview

The Rockford Fosgate M1D2-8B is an M1 series 8 inch dual voice coil (DVC) 2-ohm marine subwoofer in black, featuring Color Optix RGB LED illumination controllable via the PMX-RGB controller and RF Connect app (available on iOS and Android, sold separately). It shares the same physical dimensions and construction as the M1D4-8B but uses DVC 2-ohm voice coils, giving the VersaSwitch different impedance settings: 1-ohm (parallel) and 4-ohm (series).

The VersaSwitch allows impedance to be changed between 1-ohm (parallel) and 4-ohm (series) by flipping a single switch, without any additional wiring. Integrated Deutsch/Amphenol connectors are moulded directly into the basket frame, providing error-proof plug-and-play connectivity for both the speaker signal and Color Optix RGB lighting. Conventional zinc nickel-plated marine grade brass spade terminals are also included as an alternative wiring option.

The cone is injection-moulded mineral-filled polypropylene with UV inhibitors, co-moulded with a Santoprene VAST surround. Rockford Fosgate's patented VAST technique increases the effective radiating cone area by up to 25%. A linear synthetic fiber blend spider provides consistent excursion control. The 1.5 inch (39mm) Kapton voice coil former is sized appropriately for the 8 inch driver. The vented motor design with a water-repelling nano-coated mesh screen allows heat dissipation at high output levels while protecting the motor from water ingress. The 100% UV stable ASA plastic frame and grille resist discolouration in marine environments.

Tested to ASTM B117 (500-hour salt/fog), ASTM G154 (500-hour accelerated UV), and ISO60068-2-64 vibration standards. Klippel Verified certification applied. Sold individually - one subwoofer per purchase.

---

Features & Benefits

VersaSwitch - 1-Ohm or 4-Ohm Without Rewiring: The VersaSwitch allows the DVC 2-ohm voice coils to be configured to parallel (1-ohm) or series (4-ohm) by flipping a single switch. The 1-ohm setting maximises output from compatible mono amplifiers, while the 4-ohm setting suits amplifiers better matched to a higher impedance load.

Most Compact M1 Marine Subwoofer - 8 Inch with 3.43 Inch Mounting Depth: The M1D2-8B is the smallest subwoofer in the M1 Color Optix marine range, with a 7.10 inch cutout diameter and only 3.43 inch mounting depth. It is purpose-built for vessels and compartments where the 10 and 12 inch M1 models cannot physically fit.

Color Optix RGB LED Lighting - App Controlled: Ultra-bright wide-angle RGB LEDs are protected by optically clear UV stable encapsulation, controllable via the PMX-RGB controller and RF Connect app on iOS and Android. The PMX-RGB controller is sold separately.

Integrated Deutsch/Amphenol Connectors - True Marine Ecosystem: Moulded in-frame Deutsch/Amphenol connectors combine speaker signal and Color Optix RGB lighting into a single error-proof plug-and-play connection. Zinc nickel-plated marine grade brass spade terminals are also included for standard wiring installations.

Santoprene VAST Surround - UV and Salt-Fog Resistant: The Santoprene VAST surround is co-moulded to the mineral-filled polypropylene cone and attaches vertically using Rockford Fosgate's patented VAST technique, increasing the effective radiating cone area by up to 25% for more bass output from the same 8 inch driver.

Vented Motor with Nano-Coated Water-Repelling Mesh Screen: The vented motor design allows heat to dissipate from the 1.5 inch (39mm) Kapton voice coil former at high output levels, while the nano-coated mesh screen prevents water from entering the motor assembly in spray-intensive marine environments.

ASTM and ISO Tested - Purpose-Built Marine Construction: Tested to ASTM B117 (500-hour salt/fog), ASTM G154 (500-hour accelerated UV), and ISO60068-2-64 vibration standards. IPX6 water intrusion rating confirms protection against powerful jets of water from any direction.

---

Technical Specs

---

Compatible With / Goes Well With

The M1D2-8B is suited to marine watercraft, pontoon boats, ski boats, and any vessel requiring the most compact Color Optix marine subwoofer option with 1-ohm or 4-ohm VersaSwitch capability. The 7.10 inch cutout and 3.43 inch mounting depth make it the choice when neither the 10 nor 12 inch M1 models will fit. Sold individually.

Goes Well With:

• PMX-RGB - Rockford Fosgate Color Optix RGB controller required to access full Color Optix lighting control and RF Connect app integration
• M2-500X1 - M2 series 500W mono marine amplifier - a practical power match for the M1D2-8B at 150W RMS
• M5-1000X1 - M5 series 1000W marine monoblock amplifier at 1-ohm VersaSwitch setting for maximum headroom
• M5-1500X5 - M5 series 1500W 5-channel marine amplifier for full system builds pairing the M1D2-8B with marine full-range speakers
• M1D2-8 - White version of this subwoofer for colour-matched installations
• M1D4-8B - Black DVC 4-ohm version (VersaSwitch 2-ohm/8-ohm) for comparison when amplifier impedance requirements differ

---

Frequently Asked Questions

What is the difference between the M1D2-8B and the M1D4-8B?

Both are black M1 series 8 inch Color Optix marine subwoofers with identical construction, power handling, and physical dimensions. The only difference is voice coil impedance. The M1D2-8B has DVC 2-ohm coils with VersaSwitch settings of 1-ohm (parallel) or 4-ohm (series). The M1D4-8B has DVC 4-ohm coils with VersaSwitch settings of 2-ohm (parallel) or 8-ohm (series). Choose the M1D2-8B for amplifiers designed to deliver maximum power at 1-ohm or 2-ohm loads; choose the M1D4-8B for amplifiers better matched to 2-ohm or 8-ohm impedance.

What impedance settings does the VersaSwitch provide on the M1D2-8B?

The M1D2-8B uses DVC 2-ohm voice coils. The VersaSwitch configures the coils to parallel (1-ohm total) or series (4-ohm total) without any rewiring. Use the 1-ohm parallel setting when pairing with an amplifier rated for 1-ohm operation for maximum power output, or the 4-ohm series setting when your amplifier is better suited to a higher impedance load.

How does the M1D2-8B compare to the larger M1 series subwoofers?

The M1D2-8B handles 150W RMS from an 8 inch driver with a 3.43 inch mounting depth, making it the most compact option in the M1 Color Optix range. The M1D2-10B handles 300W RMS from a 10 inch driver requiring a 4.23 inch mounting depth, and the M1D2-12B handles 300W RMS from a 12 inch driver requiring a 6.65 inch mounting depth. Choose the M1D2-8B when space is the primary constraint; step up to the 10 or 12 inch for more output and deeper bass extension.

Is the M1D2-8B sold as a single unit or as a pair?

The M1D2-8B is sold individually - one subwoofer per purchase. Two units will need to be added to the order if a dual subwoofer installation is required.

Does the M1D2-8B come in a white version?

Yes. The white version is available as the M1D2-8, sharing the same specifications and construction.