Bose ShowTime STS118E

Overview The Bose ShowTime STS118E is a high-performance, installation-grade passive subwoofer engineered to deliver deep, controlled low-frequency reinforcement for demanding commercial and professional sound systems. Designed around a powerful 18-inch high-excursion woofer, the STS118E extends system response down to 29 Hz, providing the impactful bass required for live venues, houses of worship, sports facilities, themed entertainment, hospitality spaces, and outdoor installations. Purpose-built for permanent installations, the STS118E features a rugged IP55-rated weather-resistant birch plywood enclosure, allowing reliable operation in both indoor and outdoor environments. Integrated suspension points, removable feet, and a universal pole cup offer exceptional installation flexibility, whether ground stacked or flown. Optimized to integrate seamlessly with Bose Professional AMU, AMM, Forum, and other compatible loudspeaker systems, the ShowTime STS118E delivers predictable performance, exceptional durability, and powerful low-frequency extension for high-output applications. Key Features High-output 18-inch high-excursion woofer for powerful, extended low-frequency performance Frequency response extending down to 29 Hz (-10 dB) for deep, impactful bass Installation-grade passive design optimized for permanent commercial audio systems Weather-resistant IP55-rated enclosure suitable for indoor and outdoor applications Rugged outdoor-rated birch plywood cabinet with powder-coated stainless steel grille Flexible installation with integrated M10 suspension points Universal pole cup compatible with both 35 mm and M20 threaded speaker poles Designed to integrate seamlessly with Bose Professional AMU, AMM and Forum loudspeaker systems Available in Black and White finishes Ideal for music venues, houses of worship, sports facilities, hospitality venues, entertainment spaces and large commercial installations Specifications Configuration Passive Installation Subwoofer Low Frequency Driver 1 × 18” (457 mm) High-Excursion Woofer Frequency Range (-10 dB) 29 Hz – 263 Hz Nominal Impedance 8 Ω Sensitivity 96 dB SPL (1W/1m) Maximum SPL 125 dB (Free Field), 131 dB (Half Space) Peak Power Handling 3200 W Peak Recommended Crossover Active DSP Crossover (80 Hz – 200 Hz) Coverage Omnidirectional below 200 Hz Enclosure Material Outdoor-rated Birch Plywood Grille Powder-coated Perforated Stainless Steel Environmental Rating IP55 Mounting Options Ground Stack, Suspended Installation Suspension Points 4 × M10 Stainless Steel Pole Mount 35 mm & M20 Threaded Pole Cup Dimensions (H × W × D) 563 × 570 × 738 mm (22.2” × 22.4” × 29.1”) Available Colors Black, White Applications Houses of Worship Live Music Venues Stadiums & Sports Facilities Outdoor Entertainment Spaces Hospitality Venues Theme Parks Performance Theatres Multi-purpose Halls Large Commercial Installations