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The Bose MB24 Bass Loudspeaker is a compact, high-performance subwoofer designed to enhance low-frequency output for Bose® LT arrays and other subwoofer applications. Its advanced design delivers deep, distortion-free bass in a minimal-height enclosure, ideal for professional audio setups. Key Features Low-frequency reinforcement for Bose® LT arrays and other subwoofer applications with a 40 - 280 Hz bass response. Front-loaded tapered transmission line design provides peak-free extended low-frequency response and reduces port turbulence distortion. 2 x 12" (305 mm) high-excursion woofers with 4" (102 mm) voice coils and 800 W long-term power rating for high SPL and fast transient response. Compact enclosure optimised for bass-array applications requiring cardioid or directional-bass configurations in reverberant spaces. Specifications Enclosure: Baltic birch plywood, 13-ply, 18 mm (exterior grade for MB24 WR) Environmental: MB24: Indoor use only; MB24 WR: Outdoor rated per IEC 529 IPX5 Connectors: Two (2) parallel-wired NL4 Neutrik® Speakon® connectors Suspension / Mounting: Sixteen (16) SAE 3/8" - 16 threaded inserts (4 each top, bottom, sides), steel (stainless steel for MB24 WR) Dimensions (Enclosure only): 28.1" H x 20.0" W x 25.4" D (713 mm x 508 mm x 646 mm) Net Weight: 142 lb (64.4 kg) Colour: Black, White, Paintable (MB24 WR available in black only) Frequency Response (+/-3 dB): 40 Hz - 280 Hz Frequency Range (-10 dB): 36 Hz - 290 Hz Nominal Dispersion: Omni-directional below 200 Hz Sensitivity (SPL / 1 W @ 1 m): 94 dB SPL Maximum SPL @ 1 m: 123 dB SPL (129 dB SPL peak) Long-Term Power Handling: 800 W (3200 W peak) Nominal Impedance: 4 Ω What's in the Box 1 loudspeaker