QSC LS118 – Active Subwoofer 4000 W

The QSC LS118 is a professional active subwoofer designed for superior sound quality and reliability under any conditions. Combining 4000 W of power, innovative acoustic technologies, and a rugged birch plywood enclosure, it is the perfect solution for concerts, music clubs, theaters, and large outdoor events.

Product Features

18-inch low-frequency driver – a specially engineered long-throw driver delivers deep, precise bass that can be both heard and physically felt, adding power and energy to the music.

4000 W Class D amplifier – the efficient module provides massive power while maintaining energy efficiency thanks to Power Factor Correction (PFC). It ensures stable operation even during long performances.

Maximum SPL of 138 dB – powerful enough to cover small venues and large arenas with clear, dynamic sound at extreme volume levels.

Omnidirectional and cardioid modes – flexible setup allows precise bass coverage. Cardioid configuration reduces unwanted rear sound radiation, focusing energy toward the audience.

QSC ALP (Acoustic Linear Phase) technology – ensures phase-coherent sound and consistent coverage across the venue for a uniform listening experience.

Integration with QSC SysNav™ and Dante® – provides remote control, monitoring, and seamless integration into professional AV systems.

Rugged construction – birch plywood cabinet with a polyurea coating guarantees durability and resistance to demanding use.

Mobility – four low-noise casters make transportation easy, ideal for touring and live production crews.

Power and Precision in Low Frequencies

The LS118 stands out for its dynamic and accurate low-frequency performance. The 18-inch driver is optimized for maximum efficiency, delivering clean, natural bass. The DEEP™ mode extends the low-end range, making it ideal for electronic music, live events, and outdoor festivals where energy and depth matter most.

Thanks to QSC’s Acoustic Linear Phase (ALP) technology, the LS118 integrates seamlessly with other QSC speakers, providing consistent sound coverage across the entire venue – a crucial benefit for live productions.

Applications

The QSC LS118 is extremely versatile. It excels in mobile PA systems, permanent installations in clubs, concert halls, and theaters, and is powerful enough for large outdoor festivals. Rental companies appreciate its ease of setup, transport, and reliability in demanding conditions.

In cardioid configuration, it delivers powerful bass to the audience while reducing stage noise. In smaller spaces, omnidirectional mode ensures even bass coverage throughout the venue. Paired with QSC LA108 or LA112 line array speakers, the LS118 forms a scalable, professional-grade sound system.

Beyond live music, the LS118 is equally suited for conferences, multimedia presentations, and hybrid events requiring precise bass management and professional control.

Technical Specifications

• LF Driver: 18" (460 mm) long-throw
• Amplifier Power: 4000 W, Class D with PFC
• Frequency Response: 41 Hz – 98 Hz (-6 dB)
• Frequency Range: 35 Hz – 111 Hz (-10 dB)
• Max SPL: 138 dB (Peak)
• Coverage: Omnidirectional or Cardioid (min. 2 units)
• Connectors: XLR In, XLR Thru, 2 × EtherCON RJ45 (Dante®/SysNav™), 2 × PowerCON TRUE1
• Display: 2.4” color LCD with rotary encoder
• Cabinet: 15 mm birch plywood with polyurea coating
• Dimensions: 640 × 520 × 790 mm
• Weight: 50 kg

Materials and Build

Built for durability, the LS118 features a high-quality birch plywood enclosure finished with a polyurea coating for protection against scratches and moisture. The powder-coated steel grille protects the driver while maintaining a professional appearance. Four heavy-duty casters ensure easy handling, and M10/M20 threaded inserts allow safe mounting in multiple orientations.

Included in the Box

✔ QSC LS118 Subwoofer

✔ 4 × heavy-duty casters

✔ 1 × PowerCON TRUE1 power cable

Summary

The QSC LS118 combines power, innovative technology, and rugged construction in one package. It delivers deep, accurate bass while integrating seamlessly with professional systems via SysNav™ and Dante®. Perfect for festivals, clubs, theaters, or AV productions, this subwoofer meets the highest expectations. If you demand reliability, flexibility, and outstanding low-frequency performance, the QSC LS118 is the right choice.