JL Audio M6-8IB-C-GwGw-4 M6 Series 8" 200W RMS (400W Peak Power Handling) 4 Ohms, Marine Subwoofer with Gloss White Classic Grille
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What's Inside?
- • 8" M6 Series Marine Subwoofer with Gloss White Classic Grille
- • (1) 8" Marine subwoofer
- • (1) Grille
- • (6) 1-1/2" Stainless-steel screws
- • (6) Stainless-steel flat washers
- • Owner's Manual
Why Choose JL Audio M6-8IB-C-GwGw-4 Marine Subwoofer?
Experience Premium Bass on the Water
Enjoy bass that’s smooth, balanced, and precise, delivering world-class performance for American boaters who demand high-quality sound. Every ride becomes an immersive audio experience that’s both powerful and refined.
Versatile Bass, Maximum Efficiency
Designed for any setup, this subwoofer excels in compact enclosures or infinite baffle installations without needing a dedicated enclosure. Powerfully efficient, it pairs seamlessly with high-quality marine amplifiers for strong, consistent output every time.
Precision Bass with DMA-Optimized Technology
Experience clean, high-impact bass with DMA-optimized woofers. Proprietary motor, suspension, and cone systems minimize distortion and enhance transient response, delivering tight, precise low-end that brings every track to life on the water.
Rugged Performance with Stunning LED Style
Built for real marine duty, this subwoofer is UV- and saltwater-tested to withstand harsh marine conditions. Sport models feature Transflective™ RGB LED lighting, providing smooth, vibrant colors with no hot spots or reflections—making your boat look as impressive as it sounds.
Frequently Asked Questions (FAQ)
- • Is this an 8-ohm or 4-ohm sub, and does it affect wiring with multiple subs?
Weak bass is usually caused by improper infinite-baffle installation, incorrect amplifier settings, or reversed speaker polarity. Verify the mounting location is properly sealed and confirm the amplifier is tuned according to JL Audio's recommendations.
- • Can I install it in a sealed enclosure?
No, this model is specifically engineered for infinite-baffle applications rather than traditional sealed or ported enclosures. Installing it in the wrong enclosure type can significantly reduce bass performance.
- • Why does it sound distorted during heavy bass?
Distortion is commonly caused by amplifier clipping, excessive bass boost, or overpowering the subwoofer. Proper gain adjustment and crossover settings will help maintain clean, controlled bass output.
- • Is it built for long-term saltwater use?
Yes, it features marine-grade materials that resist corrosion, moisture, and UV exposure in harsh marine environments. Rinsing the subwoofer with fresh water after saltwater use helps extend its lifespan.
- • Why do I hear vibration around the mounting area instead of deep bass?
Most unwanted vibrations come from loose fiberglass panels, storage compartments, or mounting hardware rather than the subwoofer itself. Reinforcing the mounting surface and tightening nearby components usually eliminates the noise.
- • What amp power does it actually need to sound right?
JL Audio specs it for 50–200W RMS, and most user builds pair it with a compact marine amp like JL's M200 monoblock. Underpowering it works fine at lower volumes, but running it near the top of that range is where owners say it really comes alive.
- • Why does my amplifier shut off when the JL Audio M6-8IB-C-GwGw-4 plays loud bass?
This usually indicates incorrect impedance wiring, inadequate power delivery, or amplifier overheating. Verify the wiring configuration and ensure the amplifier is stable at the connected speaker load.
- • How should I clean and maintain it?
Wash the subwoofer with fresh water and mild soap after boating, especially after saltwater exposure. Avoid abrasive cleaners and pressure washing directly on the grille to preserve its finish and marine-grade components.
Learn how to wire subwoofers

- Diameter : 8 Inch
- Sensitivity : 86.8 dB
- Impedance : 4 Ohm
- RMS Power Range : 200 Watts
- Peak Power Handling : 400 Watts
- Color : White
- Mounting Depth : 5 Inches
Features:
- World-Class Performance: Produces bass that impresses with smoothness, balance, and precision—perfect for American boaters seeking premium sound.
- Model Specific: Optimized for compact enclosures or infinite baffle installations without a dedicated enclosure.
- Powerfully Efficient: Works best with high-quality marine amplifiers for consistent, strong output.
- DMA-Optimized Woofers: Proprietary motor, suspension, and cone systems reduce distortion and improve transient response for clean, precise bass.
- Real Marine Duty: UV- and saltwater-tested for long-lasting marine use.
- Transflective™ RGB LED Lighting: Sport models feature smooth, vibrant lighting with no hot spots or reflections.
Specifications
- Size: 8"
- Impedance: 4 Ω
- Cone Material: Mica-Filled IMPP with UV inhibitors
- Surround Material: Synthetic Rubber
- Basket/Grille Material: UV-Resistant Polymer with Stainless Steel Back Plate
- Free-Air Compatible: Yes
- RMS Power Handling: 200 W
- Sensitivity: 86.8 dB
- Top Mount Depth: 5-1/16"
- Mounting Diameter: 7-5/16"
- Vas: 15.29 L
- Fs: 54.92 Hz
- Qts: 0.787
- Xmax: 13.5 mm
- Frame Width/Length: 8.82"
- UPC: 699440936156
- Weight: 10
- Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for repair within 1 year from the original date of purchase with proper return authorization.