Bose ShowTime STS118E 18-Inch Passive Subwoofer - Black

ShowTime STS118E is a passive, installation-grade 18-inch subwoofer that matches the scale and voicing of high-output Bose Professional loudspeaker systems. With extension down to 29 Hz, STS118E provides the low-frequency impact required for music-forward and high-energy applications while remaining practical foAr permanent installations in indoor and outdoor environments. STS118E is optimized for ground-stacked placement and includes integrated suspension points, allowing system designers to adapt deployment based on room layout, sightlines, and architectural requirements. A universal pole cup supports both standard 35 mm poles and M20-threaded poles for temporary applications. IP55-rated construction enables deployment in exposed and semi-exposed locations across a wide range of venues. Available in black or white finishes, ShowTime STS118E integrates cleanly into a variety of architectural environments. When paired with compatible Bose Professional full-range loudspeakers, processors, and amplifiers, the subwoofer provides a reliable low-frequency foundation that supports high-output systems with consistency, durability, and predictable performance.

FEATURES

• 18-inch low-frequency driver : delivers high-output bass for performance-driven installed sound systems
• Installation-grade enclosure : optimized for ground-stacked or permanent suspended installations
• Outdoor-rated IP55 construction : for use in exposed and partially exposed environments
• Integrated suspension points : enable flexible mounting to accommodate layout and sightline requirements
• Universal pole cup : supports both 35 mm poles and M20-threaded poles for secure loudspeaker mounting
• Designed for seamless integration : with Bose Professional AMU, AMM, and Forum loudspeaker systems

SPECIFICATIONS

PHYSICAL

• Colors : Black, white
• Enclosure Material : Exterior-grade birch plywood
• Environmental : Rated for direct-exposure outdoor installations (IEC 60529: IP55)
• Grille : Powder-coated perforated stainless steel, paintable
• Ingress Protection : IP55
• Suspension/Mounting : (4) stainless-steel M10 attachment points (top panel), (1) pole cup for 35 mm or M20-threaded loudspeaker pole (top panel)
• Product Dimensions (H×W×D) : 563 mm × 570 mm × 738 mm (22.2 in × 22.4 in × 29.1 in)

PERFORMANCE

• Frequency Range (-10 dB) : 29 Hz – 263 Hz
• Coverage, Horizontal : Omnidirectional below 200 Hz
• Calculated Maximum SPL @ 1 m : 125 dB (free-field), 131 dB (half-space)
• Nominal Impedance : 8 Ω
• Power Handling, Peak : 3200W
• Sensitivity (SPL/1 W at 1 m) : 96 dB
• Coverage, Vertical : Omnidirectional below 200 Hz