The JL Audio 12W0v3-4 is a 12-inch passive subwoofer designed to deliver dependable low-frequency performance for car audio systems that need clean, controlled bass. Built for enthusiasts who want strong output without sacrificing clarity, this subwoofer offers a practical balance of efficiency, excursion capability, and linearity. With 300W RMS power handling and a 4-ohm impedance, the 12W0v3-4 works well with a wide range of car audio amplifiers and is a strong choice for sealed or ported subwoofer enclosure builds. Its rugged design, 2-inch voice coil, and Elevated Frame Cooling help support reliable performance during demanding listening sessions. If you are upgrading a factory system or building a custom bass setup, this JL Audio model is engineered to provide smooth, musical bass with the durability expected from a quality automotive subwoofer. Key Features 300W RMS power handling: Delivers consistent bass performance with the right amplifier matching. 12-inch passive design: A versatile size for many car audio installs, from daily drivers to custom builds. 4-ohm impedance: Offers flexible system matching for common automotive amplifier configurations. 2-inch diameter voice coil: Supports efficient power transfer and long-term reliability. Elevated Frame Cooling: Helps improve thermal management for more dependable output. Linear performance: Designed to produce controlled low bass with strong accuracy and efficiency. Enclosure-friendly tuning: Optimized for sealed and ported setups to suit different bass preferences. Technical Specifications Specification Details Brand JL Audio Model 12W0v3-4 Type Passive subwoofer Size 12 inches Continuous Power Handling (RMS) 300 W Recommended Amplifier Power (RMS) 75 - 300 W Impedance 4 ohms Nominal Diameter 12.0 in / 300 mm Overall Diameter 12.52 in / 318 mm Mounting Hole Diameter 11.0625 in / 281 mm Mounting Depth 5.40 in / 137 mm Free Air Resonance (Fs) 28.43 Hz One-Way Linear Excursion (Xmax) 0.45 in / 11.4 mm Efficien