JL Audio M7 12in Subwoofer with White Classic Grille

JL Audio M7 12in Subwoofer with White Classic Grille93669Model: M7-12IB-C-GwGw-4M7 12-inch Marine Subwoofer for Infinite-Baffle Use (600 W, 4 ohms) - Gloss White Trim Ring, Gloss White Classic GrilleEngineered as the reference standard for marine subwoofer performance, the M7-12IB is capable of producing staggering amounts of jaw-dropping bass in infinite-baffle applications.Built to withstand real-world marine duty, this M7-12IB is designed to operate without a dedicated enclosure. It boasts a monstrous 4-inch voice coil and rugged suspension system to deliver outstanding linear excursion for high output and power handling.M7-12IB is best used with amplifier power in the 200W — 600W range and is optimized to operate with a large volume of air behind it (at least 3 cu. ft. / 84.95 l).Like all JL Audio marine speakers, this driver is built to withstand a real saltwater marine environment and deliver years of listening enjoyment.USA Limited Warranty: Two (2) years from the original date of purchase.Specifications General Specifications Continuous Power Handling (RMS) 600 W Nominal Impedance (Znom) 4 ohms Physical Specifications Nominal Diameter 12.00 in / 300 mm Overall Diameter 14.00 in / 356 mm Bolt Hole Circle Diameter 12.813 in / 325 mm Frontal Grilles Protrusion 1.45 in / 37 mm Mounting Hole Diameter 12.0625 in / 306 mm Mounting Depth 7.94 in / 202 mm Driver Displacement 0.148 cu ft / 4.19 L Net Weight 25.35 lb / 11.5 kg Parameters Free Air Resonance (Fs) 35.34 Hz Electrical "Q" (Qes) 0.856 Mechanical "Q" (Qms) 10.389 Total Speaker "Q" (Qts) 0.791 Equivalent Compliance (Vas) 1.99 cu ft / 56.35 L One-Way Linear Excursion (Xmax)* 0.73 in / 18.5 mm Reference Efficiency (no) 0.28% Efficiency (1 W / 1 m)** 86.7 dB SPL Effective Piston Area (Sd) 80.54 sq in / 0.052 sq m DC Resistance (Re) 3.543 ohms * Xmax specifications are derived via one-way voice coil overhang method with no correction factors applied. ** Efficiency (1 W / 1 m) is not an accurate indicator of a subwoofer’s output capability and should not be used as a comparison to other subwoofers to determine which one is "louder". Enclosure Specifications Infinite Baffle Use Yes (preferred) Min. Sealed Enclosure Volume 2.0 cu ft / 56.6 L (or larger) Optimum Sealed Enclosure Volume 3.0 cu ft / 70.8 L