Acheter M7-12ib Speaker White One Size unisex

M7 12-inch Marine Subwoofer for Infinite-Baffle Use (600 W, 4 Ω) - 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.Specifications:- Continuous Power Handling (RMS): 600 W- Nominal Impedance (Znom): 4 ΩPhysical: - Nominal Diameter: 12.00 in / 300 mm- Overall Diameter (A): 14.00 in / 356 mm- Bolt Hole Circle Diameter (B): 12.813 in / 325 mm- Frontal Grilles Protrusion* (C): 1.45 in / 37 mm- Mounting Hole Diameter (D): 12.0625 in / 306 mm- Mounting Depth (E): 7.94 in / 202 mm- Driver Displacement: 0.148 cu ft / 4.19 L- Net Weight: 25.35 lbs / 11.5 kgParameters:- 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 ΩEnclosure: - 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