About the Rockford Fosgate M1D4-8B
Bring powerful bass and colorful lighting to your boat
Bring powerful bass and colorful lighting to your boat
On land or sea, a quality subwoofer is a must if you're serious about sound. Rockford Fosgate designed their M1D4-8 marine subwoofer to bring booming bass to your boat, along with versatile RGB LED lighting to give you looks to match their great sound.
Made for life on the water
This M1 Series M1D4-8 8" sub features a rugged, removable grille that looks great and stands up to blistering sunlight and damaging moisture. Underneath the UV-stable shell and durable Santoprene rubber surround, you'll find a injection-molded mineral-filled polypropylene cone that's treated with UV inhibitors, plus a moisture- and tear-resistant synthetic fiber blend spider.
Switchable impedance
The 2-position VersaSwitch™ lets you set up the sub for 2-ohm or 8-ohm impedance with a simple flip of the switch. Rockford Fosgate's corrosion-resistant, spring-loaded push terminals and flexible, insulated silicone lead wire will stand up to the elements, whether you're on open water or tied up at the marina. This Element Ready™ sub won't miss a beat — and neither will you.
Light up the night
The sub also features Rockford Fosgate's Color Optix™ RGB LED lighting system to give you bright, colorful lighting that accents your boat's interior. The lighting can be programmed for a variety of special lighting effects via the PMX-RGB lighting controller (sold separately) and smartphone app or with their dedicated extension cables.
Maximum versatility
Powerful enough for bass-heavy music, the M1D4-8 is a great choice for anyone who's building a serious marine audio system and wants to make a colorful impression.
Product highlights:
- 8" marine subwoofer with dual 4-ohm voice coils
- injection-molded mineral-filled polypropylene cone with Santoprene rubber surround
- integrated Color Optix RGB LED lighting included (requires separate PMX-RGB lighting controller)
- synthetic fiber blend spider
- Element Ready™ design
- rugged, UV-stable plastic parts
- corrosion-resistant spring-loaded push terminals
- IP67 certification
- removable grille included
- power handling: 150 watts RMS/600 watts peak
- sensitivity: 87.5 dB
- selectable impedance: 2 or 8 ohms
- cutout diameter: 7.12"
- top-mount depth: 3.51"
- warranty: 2 years
- MFR # M1D4-8B
What's in the box:
Rockford Fosgate M1D4-8B owner's manual
- One marine subwoofer
- One 11" LED power harnesses with 4-pin Deutsch connector on one end
- Six 1-1/2" Stainless steel Allen head screws
- 3mm Allen head bit
- 3.5mm Drill bit
- Instruction manual (English/ French/ Spanish/ German/ Italian)
- Rockford Fosgate contact information
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Features
Marine Tested: Rockford Fosgate uses industry standard tests (ASTM B117 salt/fog and ASTM G154 UV) to ensure the M1D4-8B subwoofers are durable in the difficult marine environment.
Impedance Switch: A switch on the input terminal allows you to easily change the subwoofer's impedance between 2Ω and 8Ω, internally changing between wiring the dual 4Ω voice coils in parallel and in series. (The connected amplifier should be off when changing the impedance.) The power handling is the same for either setting; 150 watts RMS/600 watts peak.
LEDs: There are red, green, and blue LEDs on the back of the grille to create a glow on the woofer cone. The LEDs can be powered individually, or in any combination you like. Depending on what combination of LED wires is connected, they light red, green, blue, yellow, pink, aqua, or white. A 12 volt power supply is needed to turn the LEDs on and a 1-amp fuse should be added in-line (fuse not included). The LEDs can also be controlled using Rockford Fosgate's LED Controller (item number 575PMXRGB, sold separately). An LED power wire harness is included with a 4-pin waterproof Deutsch DT Series connector that plugs into the subwoofer frame.
Speaker Terminals: In addition to standard male quick slide terminals, the subwoofer also has a 2-pin waterproof Deutsch terminal. A speaker wire harness with a 2-pin waterproof Deutsch DT Series connector is not included.
VAST Surround: The Vertical Attach Surround Technique (VAST) increases a speaker's effective radiating cone area without increasing the size of the basket.
Klippel Verified: The Klippel distortion analyzer, a device that uses a laser and sophisticated software to do large-scale analysis of drivers in motion, lets Rockford Fosgate optimize the speaker's motor structure, voice coil alignment, and suspension to yield the best possible performance.
Stainless Steel: The mounting hardware is stainless steel to resist corrosion.
Enclosure/Free-Air: The sub can be mounted in a sealed or ported box, or in an infinite-baffle (free-air) application. The optimum internal volume of a sealed enclosure is 0.55 ft³; from 0.4 to 0.75 ft³ is acceptable. The 0.55 ft³ enclosure yields a -3dB point of 47.7 Hz. The best ported enclosure volume is 1.1 ft³ using one 3" diameter x 9.4" long port; this yields a tuning frequency of 45 Hz and a -3dB point of 34.7 Hz. Infinite-baffle mounting yields a -3dB point of 42.7 Hz.
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