QSC LS118 18-in Direct-radiating Active Subwoofer

QSC LS118 18-inch Direct-Radiating Active Subwoofer

The QSC LS118 is a high-performance, next-generation active subwoofer designed for professional sound reinforcement in live venues, fixed installations, touring systems, and event production. It features an 18-inch long-excursion, direct-radiating low-frequency driver paired with a powerful integrated Class-D amplifier, delivering high-output, low-distortion bass with excellent clarity and impact.

Key Features

• 18-inch (460 mm) long-excursion direct-radiating woofer for deep, controlled low-frequency reproduction
• Integrated high-efficiency Class-D amplifier with up to 4000 W peak power output
• Extremely high sound pressure capability, reaching up to approximately 138 dB peak SPL
• Frequency response optimized for professional use, extending roughly from the mid-30 Hz range up to around 100 Hz depending on mode
• Acoustic Linear Phase (ALP) processing for consistent phase alignment with compatible QSC systems
• Supports omnidirectional and cardioid bass configurations (cardioid requires multiple units) for improved stage control and bass directionality
• “DEEP” low-frequency enhancement mode for extended sub-bass performance
• Integrated DSP with system protection, limiting, and tuning functions
• Network control and audio support via Dante and Q-SYS ecosystem integration
• QSC SysNav software/app for configuration, monitoring, and system optimization
• Rugged birch plywood enclosure with durable protective coating for touring and installation use