JL Audio 12W1v3-2 / 12W1v3-4 Subwoofer Driver Owner's Manual

Quick Guide from the Manual

The JL Audio 12W1v3 series subwoofers are high-performance drivers designed for automotive use. To ensure optimal performance and longevity, it is critical to match the amplifier power correctly and build an enclosure that meets the specific volume requirements for either sealed or ported designs. Always secure the enclosure firmly to the vehicle frame to prevent it from becoming a projectile in the event of a collision.

Physical Specifications

The 12W1v3 series requires specific mounting dimensions for proper installation:

• Nominal Diameter: 12.0 inches (300 mm)
• Overall Diameter: 12.50 inches (318 mm)
• Mounting Hole Diameter: 11.0625 inches (281 mm)
• Bolt Hole Circle: 11.7 inches (297 mm)
• Magnet Diameter: 5.25 inches (133 mm)
• Mounting Depth: 5.41 inches (137 mm)
• Net Weight: 12.2 lbs (5.5 kg)

Enclosure Recommendations

The manual provides two recommended enclosure types. All volumes listed are net internal volumes; you must account for box, port, and brace displacement when building.

• Sealed Enclosure: Recommended for tight spaces. Provides excellent sound quality. Net internal volume: 1.10 ft³ (31.15 liters).
• Ported Enclosure: Provides 3dB more output at the same power. Net internal volume: 1.6 ft³ (45.3 liters).

Important Construction Notes:

• Use material at least 5/8 inch (16mm) thick. If using 5/8 inch material, subtract 1/4 inch (6.5mm) from each dimension.
• Do not use material thinner than 5/8 inch as it may compromise rigidity.
• When using two subwoofers in a common enclosure, double the required volume and, for ported designs, use two times the recommended port(s).

Power Handling Guidelines

The manual defines a power range for the driver to ensure reliability:

• Minimum (Medium Gray): Comfortable operating range, will not stress the woofer but may not extract full performance.
• Optimum (Light Gray): Best compromise between reliability, high output, and low distortion.
• Maximum (Dark Gray): Slightly more SPL, but operate with caution.
• Warranty Void (Black): Operating in this zone carries a high probability of failure due to heat or mechanical stress.

Installation and Safety

Prolonged exposure to sound pressure levels exceeding 100dB can cause permanent hearing loss. When installing the subwoofer in a vehicle, it is extremely important to secure the enclosure firmly. JL Audio recommends bolting the enclosure through the metal of the floorpan or the vehicle frame using large diameter washers for reinforcement.

Compatibility

This speaker is recommended for use in bi-amplified systems using high-quality satellite speakers and amplifiers. The use of a passive crossover (coil) is not recommended as it will adversely affect performance.