Overview:
The QSC CS18-NA is a high-performance active 18-inch subwoofer engineered to deliver deep, powerful low-frequency reinforcement for live sound, mobile entertainment, houses of worship, event production, and installed audio applications. As the largest model in the CS Series, the CS18 combines exceptional bass output with advanced DSP, wireless control capabilities, and rugged construction for demanding professional environments.
Powered by a 3600W peak Class D amplifier, the CS18 delivers impressive low-frequency extension and maximum output while supporting Bluetooth® audio streaming, True Wireless Stereo (TWS), QSC Loudspeaker Control App integration, DEEP™ bass enhancement, and Cardioid deployment configurations for optimized bass management.
Features:
18-inch direct-radiating active subwoofer design
3600W peak Class D amplifier
Maximum SPL of 135 dB
Bluetooth® audio streaming with True Wireless Stereo (TWS)
Wireless control via the QSC Loudspeaker Control App
DEEP™ preset for enhanced low-frequency performance
Cardioid deployment mode for improved bass directivity
Premium birch plywood enclosure for durability and reduced resonance
Convection-cooled design for reliable operation
Two locking XLR/TRS combo inputs
Loop-thru and post-DSP XLR outputs
M20 threaded speaker pole mount
Universal 100-240 VAC power supply
Integrated DSP with user-selectable operating presets
Designed for portable and installed professional audio applications
Specs:
| Configuration | Direct Radiating |
| LF Transducer | 18" Cone Driver |
| Amplifier | Class D, 3600W Peak |
| Maximum SPL | 135 dB |
| Frequency Response (-6 dB) | 40 Hz - 100 Hz (DEEP: 36 Hz - 100 Hz) |
| Frequency Range (-10 dB) | 35 Hz - 108 Hz (DEEP: 32 Hz - 100 Hz) |
| Coverage Pattern | Omni-Directional or Cardioid Radiation Modes |
| Bluetooth | Bluetooth® Audio with True Wireless Stereo (TWS) |
| Mobile App Control | QSC Loudspeaker Control App |
| Cooling | Convection Cooled |
| Inputs | 2 x Locking XLR/F-1/4" Combo Inputs |
| Outputs | 2 x XLR/M (1 Loop-Thru, 1 Post-DSP Output) |
| Power Input | 100-240 VAC, 50-60 Hz Universal Power Supply |
| Enclosure | 12-15 mm Birch Plywood |
| Grille | 16-Gauge Powder-Coated Steel |
| Finish | Black (RAL 9011) |
| Dimensions (H × W × D) | 26.0" x 20.7" x 24.0" |
| Net Weight | 85.5 lb |
| Shipping Dimensions (H × W × D) | 29.1" x 24.2" x 28.0" |
| Shipping Weight | 101.4 lb |