BST BST-S18A - 18″ (46 cm) 1600 W Active Subwoofer

BST BST-S18A – 18″ (46 cm) 1600 W Active Subwoofer

The BST BST-S18A active subwoofer delivers deep, controlled bass for professional PA systems in live venues, clubs, and corporate events. Powered by an 800W RMS (1,600W peak) Class D amplifier, it features two high-quality XLR/jack combo line inputs and two XLR outputs with 120Hz hi-pass filter or full-range signal. An adjustable low-pass filter (LPF 80–200Hz), phase inverter, and LED signal and limiter indicators make it easy to fine-tune your setup in any room. The XXL multi-ply wood cabinet with internal reinforcements and a pole-mount handle ensures robustness and optimal acoustics, while the 100–240V input switching and weight of 47.4kg ensure reliability and easy integration into professional installations.

Main features

• Power: 800 W RMS / 1,600 W peak
• Speaker: 18″ (460 mm) with 100 mm voice coil
• Frequency response: 40–200 Hz
• Inputs: 2× XLR/jack 6.3 mm combo
• Outputs: 2x XLR with hi-pass filters at 120 Hz or full-range
• Filters: Adjustable LPF 80–200 Hz; Phase Inverter 0–180°
• Controls and indicators: volume potentiometers, signal and limiter LEDs
• Power supply: 100–240 V ~ 50/60 Hz
• Cabinet: Multi-layer wood (XXL) with resistant black paint and internal reinforcements
• External dimensions: 550 × 710 × 710 mm
• Net weight: 47.4 kg

Product benefits

• Powerful and defined bass: the Class D amplifier and XL cabinet reduce distortion at high sound pressure levels.
• Versatile integration: Adjustable filters and hi-pass outputs facilitate linking with satellites or full-range systems.
• Quick Setup: Front controls and LED indicators offer intuitive, on-the-fly setup.
• Professional construction: robust cabinet and mast handle for rigging, ideal for touring and demanding stages.
• Global Compatibility: Universal voltage range and XLR/jack connections for any professional audio equipment.

Use cases

• Subwoofer in PA systems for concerts and festivals.
• Bass reinforcement in clubs, auditoriums and conference rooms.
• Fixed installations in theaters and event centers.
• Live sound system for audiovisual and corporate productions.

Frequently Asked Questions

• Can I daisy-chain multiple subwoofers? Yes, connect the XLR output to the input of another BST-S18A or full-range satellites.
• Is it suitable for outdoor use? Its finish and construction withstand intensive use; it is recommended to cover it from direct rain.
• How do I select the crossover frequency? Adjust the LPF potentiometer (80–200 Hz) to determine the desired crossover point with the satellite speakers.

Description for projects

BST BST-S18A active subwoofer: 18″/460 mm, 800 W RMS / 1,600 W peak, 40–200 Hz, XLR/jack combo inputs, 120 Hz hi-pass XLR outputs, adjustable LPF, phase inverter, 550×710×710 mm multi-ply wood cabinet, 47.4 kg.