Bose STS118E Passive Subwoofers | Sai Enterprises AV Solutions

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Bose STS118E Passive Subwoofers

ShowTime STS118E is a passive, installation-grade 18-inch subwoofer that matches the scale and voicing of high-output Bose Professional loudspeaker systems.

Brand: Bose ProfessionalModel: STS118E

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 for 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.

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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

20 attributes

Attribute	Value
Brand	Bose Professional
Series	ShowTime
Model	STS118E
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)
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
Crossover	80 Hz - 200 Hz, requires active crossover in DSP
Low-Frequency	1 x 18.0-in (457 mm) high-excursion woofer
Applications	Houses of worship, Performance venues, Sports facilities, Themed entertainment, Outdoor gathering spaces, Fitness facilities, Multipurpose halls

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