JL Audio M3-10ib-s-gw-4 M3-10ib Sport Speaker 93530

M3 10-inch Marine Subwoofer for Infinite-Baffle Use (175 W, 4 Ω) - Gunmetal Sport GrilleWith appropriate system setup, the addition of a subwoofer allows your smaller main speakers to be free of the burden of reproducing low frequencies. This allows your whole system to play louder and to sound cleaner at all listening levels.Purpose-engineered and built for real marine duty, the M3 infinite-baffle subwoofers are designed to operate without a dedicated enclosure and are targeted towards moderate power applications.The M3-10 is best used with amplifier power in the 50W - 175W range and is optimized to operate with a large volume of air behind it (at least 2 cu. ft. / 56.6 l). If you need a Subwoofer that operates in a small sealed enclosure, select our M6-10W, instead.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): 175 W- Nominal Impedance (Znom): 4 Ω- Nominal Diameter: 10.0 in / 250 mm- Overall Diameter (A): 10.75 in / 273 mm- Mounting Hole Diameter (B): 8.875 in / 225 mm- Bolt Hole Circle Diameter (C): 9.706 in / 247 mm- Motor Outer Diameter (D): 5.29 in / 134 mm- Mounting Depth (E): 5.12 in / 130 mm- Driver Displacement: 0.04 cu ft / 1.13 L- Net Weight: 6.5 lb / 2.94 kg- Free Air Resonance (Fs): 41.84 Hz- Electrical Q (Qes): 0.806- Mechanical Q (Qms): 11.751- Total Speaker Q (Qts): 0.754- Equivalent Compliance (Vas): 1.29 cu ft / 36.53 L- One-Way Linear Excursion (Xmax)*: 0.42 in / 11 mm- Reference Efficiency (no): - Efficiency (1 W / 1 m)**: 87.23 dB SPL- Effective Piston Area (Sd): 50.68 sq in / 0.0327 sq m- DC Resistance (Re): 3.957 Ω- Infinite Baffle Use: Yes (preferred)- Min. Sealed Enclosure Volume: 2.0 cu ft / 56.6 L (or larger)- Optimum Sealed Enclosure Volume: 2.5 cu ft / 70.8 LMaterials: - Injection-molded mica-filled polypropylene cone bodies with synthetic rubber surrounds, specifically formulated with UV inhibitors for marine duty.- Marine-grade, synthetic fiber spiders with progressive roll designs to withstand high humidity.- Specifically engineered polymer baskets are corrosion and UV-resistant and encapsulate the woofer´s motor system to prevent corrosion.- Gold-plated, marine-grade brass connection terminals- Marine-grade stainless steel mounting hardware is included.