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Alto Professional TS18S - 2500-Watt Powered Subwoofer with 18” Driver The Alto Professional TS18S delivers powerful, controlled low-end sound with 2500 watts of peak power. Designed for live performances and professional audio setups, this 18-inch powered subwoofer enhances your PA system with deep, punchy bass and reliable performance. Key Features 2500W peak power output for impactful bass High-efficiency Class D amplifier 18-inch driver with 3-inch high-temperature voice coil (2) XLR + 1/4-inch combo inputs and (2) XLR thru outputs for easy linking User-selectable EQ tunings: Off, Live, DJ Phase alignment selector switch with 0°, 90°, 180°, 270° settings Rugged, internally braced front-ported MDF cabinet with integrated 36 mm pole socket Mark-resistant splatter-spray finish for durability Electronic clip, thermal, and transducer overdrive protection Designed and tuned in the USA Performance and Build Quality The TS18S is engineered for tight, punchy low-end response that complements any full-range speaker setup. Its premium internally braced composite cabinet minimises unwanted vibrations and rattles, ensuring clear and defined bass. The 18-inch woofer with a 3-inch voice coil is built to withstand the rigours of live performances, whether permanently installed or on the road. With versatile onboard controls including user-selectable EQ and phase alignment, the TS18S integrates seamlessly into any sound system. Dedicated input and output connections allow easy linking with Alto Professional full-range loudspeakers or other standard units. Specifications Output Power: 2500W peak @ 4Ω Transducer Low: 18” (457 mm) woofer; 3” (76.2 mm) high-temperature voice coil Frequency Response: 35 Hz–100 Hz (-3 dB) Frequency Range: 27 Hz–111 Hz (-10 dB) Maximum SPL: 137 dB (@1 m) Connections: (2) XLR + 1/4” (6.35 mm) inputs; (2) XLR outputs; (1) IEC power cable input External Controls: Volume control, signal/clip limiter with LED, speaker use button, proximity button, power switch with LED Electronic Protections: Electronic clip, thermal and transducer overdrive protection Enclosure: Internally braced MDF cabinet; 36 mm mounting pole socket on top panel; caster insert thread gauge: M6 x 1.00 mm Power Connection: Standard IEC cable Input Voltage: 100-120 V, 50/60 Hz; 220-240 V, 50/60 Hz Power Consumption: 1600W Fuse: 100-120 V, T15AL AC250V; 220-240 V, T8AL AC250V Dimensions (H x W x D): 26.7” x 20.9” x 24.7” / 678.2 x 530.9 x 627.4 mm Weight: 93.0 lbs / 42.2 kg