A Next-gen, Intelligent, Active Subwoofer
The QSC LS118 is a next-gen active subwoofer that packs intelligent, leading-edge digital processing into a lightweight, easy-to-deploy package. This 4,000-watt peak sub boasts a superb-sounding long-excursion cone driver, yielding an impressive low-frequency performance and distortion-free playback at high SPLs. You get selectable omnidirectional and cardioid radiation modes, along with a Deep mode for extreme low-frequency extension. Beyond that, the LS118's ALP design and onboard Dante networking guarantee outstanding coherence and lock-tight interoperability with other Dante-compatible audio equipment. You also get a rugged wooden enclosure with a durable polyurea coating, four low-noise, heavy-duty casters for effortless portability, and a generous range of deployment options. Moreover, QSC's SysNav app enables you to design, configure, control, and monitor your entire array with unprecedented simplicity. A universal power supply with a low 3.6amp power consumption rounds out the LS118's ample feature set. The QSC LS118 makes a perfect complement to the company's LA108 and LA112 active line array loudspeakers.
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State-of-the-art design
Driven by an ultra-efficient, 4,000-watt Class D amplifier, the LS118 comes loaded with a purpose-designed 18-inch long-excursion, direct-radiating low-frequency driver, yielding impressive low-frequency performance down to 41Hz and a high, undistorted maximum peak SPL of 138dB. Moreover, selectable omnidirectional and cardioid radiation modes give you precise control over this subwoofer's projection, and a Deep mode gives you extra low-frequency extension for bass-heavy applications. This powered subwoofer's ALP (Acoustic Linear Phase) design delivers outstanding coherence between QSC loudspeakers deployed in the same audio system, exhibiting a uniform listening experience throughout your entire venue. To top it off, the LS118 includes Dante networking for lock-tight interoperability with Dante-compatible equipment, including seamless control and monitoring integration into the Q-Sys ecosystem.




Rock-solid construction
The QSC LS118 makes a rock-solid addition to any portable system or small- to medium-size installation. For starters, this near-bulletproof sub is built to handle the rigors of live sound reinforcement, boasting a rugged wooden enclosure with a polyurea coating for long-lasting durability. You also get four low-noise, heavy-duty castors for easy transport. The LS118 works in vertical or horizontal deployments; its M20 threaded pole receivers can be used alongside array frame and ground-stack adapters or loudspeaker poles for flexible installation. And regardless of how you put it together, your entire system can be designed, configured, controlled, and monitored using the QSC SysNav app. The LS118, when deployed as part of a complete line-array system, offers intuitive installation like nothing else we've seen here at Sweetwater.
QSC: creating leading-edge products
For over 50 years, QSC has produced leading-edge sound products that meet even the most demanding pro audio standards. Sweetwater is proud to offer a full lineup of QSC's active PA speakers, passive PA speakers, ultra-efficient power amps, and advanced TouchMix mixers. Built to satisfy any live sound setup, QSC products deliver the perfect combination of power, reliability, and lightweight, compact portability.

QSC LS118 Active Subwoofer Features:
- Driven by an efficient, 4,000W Class D amplifier with Power Factor Correction and low AC consumption
- 18-inch long-excursion, direct-radiating LF driver yields impressive low-frequency performance down to 41Hz
- Delivers a high, undistorted 138dB maximum peak SPL
- Selectable omnidirectional and cardioid radiation modes supply precise control over the sub's projection
- Deep mode gives you an extra low-frequency extension for bass-heavy applications
- ALP (Acoustic Linear Phase) design delivers outstanding coherence between QSC speakers deployed in the same audio system
- Dante networking supplies lock-tight interoperability with Dante-compatible equipment, including integration into the Q-Sys ecosystem
- Rugged wooden enclosure with a polyurea coating for long-lasting durability
- 4 low-noise, heavy-duty castors for easy transport
- Works in vertical or horizontal deployments
- M20 threaded pole receivers can be used alongside array frame and ground-stack adapters or loudspeaker poles for flexible installation
- SysNav app enables you to design, configure, control, and monitor your entire array
- Universal power supply, 100–240 VAC, 50–60Hz
- Makes an excellent companion for the company's LA108 and LA112 active line array loudspeakers
- Ideal for portable applications, rental companies, and small- to medium-sized installations