QSC KS118 18" 3,600W Powered Subwoofer

The QSC KS118 18" active subwoofer is built to deliver deep, chest-pounding bass for live sound applications, mobile DJs, and event production. With a powerful 3,600W Class-D amplifier driving an 18" direct-radiating woofer, this sub produces tight, low-end frequencies down to 35Hz. Tailored for modern bass-heavy genres and dynamic live performances, it combines professional-grade sound reproduction with rugged construction. Onboard DSP offers advanced system optimization, allowing users to customize output settings and ensure consistent performance in any venue. Compact and road-ready, the KS118 strikes a balance between portability and power, making it a reliable choice for professionals on the move.

Powered Subwoofer With DSP and DEEP Mode

At the heart of the KS118 is a 3,600W Class-D amp paired with a high-performance 18" woofer. This combination delivers massive sound pressure levels and tight, musical bass reproduction. The woofer's long excursion capability ensures deep low-frequency extension without distortion, even at high outputs. This makes the KS118 ideal for clubs, outdoor events or venues requiring robust low-end response. Its ability to handle modern electronic and hip-hop music ensures audiences can feel the bass as much as they hear it.

The onboard DSP enhances system functionality while protecting the subwoofer during demanding use. Advanced features allow users to array two KS118 units in a cardioid configuration, maximizing bass projection in front while reducing unwanted sound behind the setup. DSP monitoring safeguards the system from overheating or overexcursion, ensuring reliable operation across extended gigs. For users seeking even more intensity, the DEEP mode focuses amplifier power on the lowest frequencies, adding punch and rumble to tracks with ultra-low bass.

Despite its high output, the KS118 remains portable and user-friendly. Weighing in at 104 lb., it features ergonomic aluminum handles and low-noise casters for hassle-free transport. Its robust birch cabinet and steel grille provide durability, built to withstand the rigors of touring and frequent use. A top-mounted M20 threaded pole receptacle allows integration with full-range loudspeakers for a complete sound system, making the KS118 a flexible option for DJs, live bands, and professional AV setups.

The KS118 delivers versatile performance across multiple environments. Its compact design makes it suitable for setup in smaller venues, while its output power handles large-scale productions with ease. Whether used individually or as part of an array, this subwoofer adapts to the needs of any performance. Its rugged build ensures long-term reliability, while its professional-grade sound quality meets the standards of experienced sound engineers and performers alike.

18" Active Subwoofer With 3,600W of Power for Deep Bass in DJ, Live Sound and Venue Applications

The KS118 enables live sound professionals and DJs to deliver consistent, impactful bass across any performance setting. Mobile DJs can rely on its powerful low-end for weddings, corporate events or nightclub gigs. Event producers benefit from its ability to handle diverse environments, from outdoor festivals to indoor venues. Its cardioid array capability minimizes sound bleed, keeping audio focused in front of the system. For live bands, the KS118 complements full-range speakers to ensure every kick drum and bass note hits with clarity and force.

The QSC KS118 18 active subwoofer is designed to meet professional demands for powerful bass and reliable performance. With advanced DSP, DEEP mode and rugged construction, it delivers impactful sound in any venue or event. Add the KS118 to your setup and transform your live sound with thunderous low-end frequencies.