M6-8TIB-L-SbSb-8 marine subwoofer enclosure

The JL Audio M6-8TIB-L-SbSb-8 subwoofer delivers an RMS power output of 250 W.

The nominal impedance of this subwoofer is 8 ohms.

Yes, this subwoofer is specifically designed for marine environments. It features a corrosion-resistant polymer basket and a synthetic fiber spider to withstand harsh sea conditions.

Here are the main dimensions of the subwoofer:

Total diameter (round): 254 mm (10 inches)
Mounting depth: 96.5 mm (3.8 inches)
Cutout diameter: 228.6 mm (8.96 inches)

Yes, the JL Audio M6-8TIB-L-SbSb-8 subwoofer is supplied with a round black Luxe-type grille.

The JL Audio M6-8TIB-L-SbSb-8 subwoofer has an IEC 60529 IPX5 ingress protection rating. This means the front face of the unit is protected against low-pressure water jets.

Yes, this subwoofer is designed and optimized for infinite baffle use, requiring a large volume of air behind it without a dedicated enclosure. For optimal performance, the compartment or area behind the mounting location must remain empty.

The net weight of the JL Audio M6-8TIB-L-SbSb-8 subwoofer is 3.4 kg (7.5 lb).

For installing the subwoofer, the following tools are recommended:

A saw or appropriate cutting tool.
Marine sealant (e.g., 3M™ 4200 or 5200).
Female 4.8 mm and 6.3 mm fork connectors.
A torque screwdriver with Phillips bit.
A #2 Phillips screwdriver.
A drill and drill bits.
A wire cutter and wire stripper.
A crimping tool.
Speaker wire (see gauge recommendations).
Note that additional tools and materials may be required for custom installations.

For optimal installation, consider the following points:

Select a location that protects the rear of the speaker from moisture. If the speaker is exposed to weather or water, mount it on a vertical surface. If mounted outside the boat, ensure it is well above the waterline and protected from impacts. The location must provide sufficient clearance for the mounting depth (96.5 mm). Choose a flat, vertical mounting surface for better waterproofing. The mounting panel thickness must be between 6 mm and 41 mm. Protect wires from sharp objects and use grommets when passing wires through panels.

The mounting panel thickness for the JL Audio M6-8TIB-L-SbSb-8 subwoofer must be between 6 mm (0.25 in.) and 41 mm (1.625 in.).

Use oxygen-free copper (OFC) speaker wire, 16 AWG gauge (1.3 to 1.5 mm²). Avoid copper-clad aluminum (CCA) wire as it is more prone to breakage and can degrade performance.

After placing the speaker in the cutout, use a #2 Phillips screwdriver to turn the screws and extend the mounting tabs to lightly secure the speaker to the surface. Then, use a torque screwdriver to hand-tighten the screws to 1.69 N·m (1.25 lbf·ft). Using power tools to fully tighten the screws could permanently damage the speaker.

Yes, to avoid any interference with a magnetic compass, you must not mount the subwoofer closer to a compass than the specified safety distance, which is 235 cm (93 inches).

Although designed for infinite baffle, this subwoofer can be installed in dedicated enclosures. Recommended specifications:

Sealed enclosure: Internal net volume: 56.66 L (2.00 ft.³)
Vented enclosure: Internal net volume: 42.5 L (1.50 ft.³)
Port diameter: 102 mm (4.00 in.)
Port length: 343 mm (13.50 in.)
Note that these volumes are internal net volumes; you will need to add enclosure displacement and bracing to obtain the final internal gross volume.

To clean the subwoofer, follow these steps:

Clean all speaker residues with a damp cloth soaked in fresh water. Use a mild detergent to remove significant residue buildup or stains. It is important not to use harsh cleaners or solvent-based products, as they can cause corrosion, damage the product, and void the warranty. Additionally, although the front face is protected against low-pressure water jets, do not use high-pressure water spraying, as this could damage the rear of the speaker.

The recommended RMS amplifier power for the JL Audio M6-8TIB-L-SbSb-8 subwoofer is 50 to 250 W.

Yes, you can connect two subwoofers in parallel. In this case, the combined impedance will be 4 ohms. For wiring, it is recommended to use:

For a distance of 0 to 4 m (0 to 14 ft) between the amplifier and the speakers: 16 AWG (1.3 to 1.5 mm²) wire.
For a distance of 4 to 10.5 m (14 to 35 ft) between the amplifier and the speakers: 12 AWG (3 to 4 mm²) wire.
Ensure you use oxygen-free copper (OFC) wire and respect polarity.

Several situations can void the warranty of the subwoofer, including:

Exposure to moisture on the rear of the speaker, including all components and connected wires, as this part is not waterproof. Damage caused by high-pressure water spray during cleaning. Using power tools to fully tighten mounting screws, which can cause permanent damage to the speaker. Permanent damage to the audio system resulting from not protecting terminals and connections against grounding or cross-connections. Using aggressive or solvent-based cleaners on the speaker.

If you hear no sound, check that all connections—from the source and/or amplifier—are properly connected to the speaker terminals. Also ensure wire polarity is correct (positive to positive and negative to negative).