QSC LS218 5000W Powered Subwoofer

With dual 18" long-excursion drivers, 5000 watts of Class D amplification and peak output reaching 141dB SPL, the QSC LS218 powered subwoofer delivers next-generation low-frequency performance for modern sound systems. Designed as an intelligent active subwoofer, it combines massive output, energy-efficient power design and advanced DSP in a package that scales from simple plug-and-play rigs to fully networked production environments. Integrated digital audio networking, flexible deployment options and system-level coherence make the LS218 a powerful foundation for professional live sound and installed applications.

Extreme Output and Efficient Power Design

At the heart of the LS218 are two 18-inch direct-radiating drivers engineered for high excursion and controlled low-frequency reproduction. Driven by a 5000W Class D amplifier with Power Factor Correction, the system delivers impressive output while maintaining low AC current draw. Selectable DEEP mode extends low-frequency response when maximum impact is required, making the LS218 well suited for large venues, outdoor stages and high-energy productions where bass performance must remain clean and authoritative.

Advanced DSP Networking and System Control

The LS218 is built for modern networked workflows, featuring digital audio-over-IP via Dante for seamless integration with other professional audio equipment. QSC SysNav System Navigator allows users to design, configure, control and monitor individual subwoofers, arrays or grouped systems with precision. Omni and cardioid operating modes provide control over low-frequency directivity, helping manage stage wash and improve system clarity in complex deployments.

Scalable Integration With QSC Line Array Systems

Designed for real-world deployment, the LS218 is a flexible low-frequency solution for live production companies, touring acts, FOH engineers, houses of worship, installation contractors, system integrators and rental houses. When paired with LA108 or LA112 active line array loudspeakers, Acoustic Linear Phase technology supports coherent system performance across the venue. Multiple deployment options and networked control make the QSC LS218 easy to scale from portable productions to permanent installations with confidence.