Sound Barrier SWX218 — Dual 18″ Passive Subwoofer
SWX218 Overview
The Sound Barrier SWX218 is a double 18″ passive subwoofer system designed for professional audio environments demanding authoritative low-frequency output. Built around dual 18″ woofers with aluminum frames, long-excursion neodymium magnets, and 4.5″ high-temperature-resistant voice coils, the SWX218 delivers 2400W AES power handling with a 9600W peak rating and a continuous SPL of 134dB (140dB peak). A frequency response of 32Hz to 300Hz and a 4Ω impedance make it well-suited for large-format live sound reinforcement, touring rigs, and permanent installations. System integrators, touring companies, and venue operators will find the SWX218 a reliable foundation for high-output subwoofer arrays.
The cabinet’s integrated suspension hardware supports deployment via a customized fly bar or flying frame, while four bar handles (two per side) facilitate ground-stacking and transport in demanding production environments.
Key Features
- Dual 18″ Woofers with Aluminum Frames — Rigid aluminum frames maintain precise driver alignment under sustained high-power operation
- Long-Excursion Neodymium Magnets — Provide the motor strength needed for deep, controlled bass extension down to 32Hz
- 4.5″ High-Temperature Voice Coils — Engineered to sustain thermal stress during extended high-power use without performance degradation
- Waterproof Cones — Maintain consistent performance in outdoor and high-humidity environments
- 2400W AES / 9600W Peak Power Handling — Supports high-headroom amplification for large-venue applications
- 134dB Continuous SPL (140dB Peak) — Delivers the output levels required for festival stages, large venues, and touring productions
- 18mm Birch Plywood Cabinet with Black Polyurea Coating — Provides structural rigidity and road-ready durability with a protective finish resistant to impact and moisture
- Integrated Fly Hardware — Compatible with customized fly bar or flying frame for flown array configurations, expanding deployment flexibility
Technical Specifications
| Configuration | Dual 18″ Passive Subwoofer |
| Frequency Response | 32Hz to 300Hz |
| Impedance | 4Ω |
| Power Handling (AES) | 2400W |
| Power Handling (Peak) | 9600W |
| Sensitivity | 100dB (1W/1m) |
| Maximum SPL (Continuous) | 134dB |
| Maximum SPL (Peak) | 140dB |
| Woofer Frame Material | Aluminum |
| Voice Coil Diameter | 4.5″ |
| Magnet Type | Long-Excursion Neodymium |
| Cabinet Material | 18mm Birch Plywood |
| Cabinet Finish | Black Polyurea Coating |
| Grille | Perforated Steel |
| Acoustic Foam | Waterproof and Dustproof |
| Handles | Four Bar Handles (Two Per Side) |
| Suspension | Integrated Hardware for Fly Bar or Flying Frame |
Reviews
There are no reviews yet.