QSC LS218 Powered Dual 18-inch Subwoofer

The QSC LS218 is a next-generation, high-performance active subwoofer designed to deliver powerful, controlled low-frequency impact for professional live sound, DJs, touring productions, and installed AV systems. Combining advanced system intelligence with premium components, the LS218 produces deep, tight bass with exceptional clarity and reliability.

Engineered for both portability and large-scale productions, the LS218 is easy to configure and deploy. Whether you're running a simple plug-and-play DJ setup or a fully networked Dante® audio system, this subwoofer integrates seamlessly into your rig. Built-in system intelligence optimizes performance while simplifying setup, saving time on-site.

The LS218 features QSC's Acoustic Linear Phase (ALP) design, allowing smooth integration with compatible QSC loudspeakers for coherent, aligned system performance. This ensures accurate low-frequency reproduction and consistent coverage across the listening area.

For maximum low-end control, two or more LS218 subwoofers can be configured in a cardioid setup, directing bass energy forward while significantly reducing unwanted low-frequency buildup behind and around the stage-ideal for clubs, festivals, houses of worship, and corporate events.

QSC LS218 Features:

• Very high SPL output (141 dB peak) with impressive low frequency performance
• Two 18-inch (460 mm) long excursion direct radiating driver
• Energy-efficient, 5000 W peak power Class D amplifier module with Power Factor Correction and extremely low AC consumption
• Acoustic Linear Phase (ALP) design provides complementary coherence between QSC loudspeakers deployed in the same audio system delivering a uniform listening experience across the entire venue
• QSC SysNav™ (System Navigator) App allows the user to easily design, configure, control, monitor and apply signal processing to individual subwoofers, full arrays or groupings of both. Network solution includes digital audio-over-IP (Dante ®) for interoperability with other audio equipment and seamless control and monitoring integration into the Q-SYS Ecosystem via Q-SYS Inventory Extensions
• Omni-directional or cardioid radiation modes (cardioid setup requires min. 2 units)
• Selectable DEEP™ mode for extremely low frequency extension
• Rugged wooden enclosure with Polyurea coating for lasting durability
• Vertical or horizontal deployments (M20 threaded pole receivers) combined with array frame/ground-stack adapters or loudspeaker poles.
• Complemented by LA108 and LA112 active line array loudspeakers

QSC LS218 Specifications:

• Configuration: Direct radiating, active subwoofer
• LF Transducer: (2x) 460 mm (18-inch), cone
• Frequency Response (-6 dB): 41 Hz - 98 Hz
• Frequency Range (-10 dB): 35 Hz - 111 Hz
• Nominal Coverage Angle: Omni-directional or cardioid radiation modes (cardioid setup requires minimum 2 units)
• Maximum Rated SPL (peak): 141 dB @ 1 m (peak)
• Amplifier (peak): Class D, 5000 W
• Cooling: Low noise, variable speed fan
• Controls: Rotary push encoder; 2 x push buttons (Menu, ID)
• Display Screen: 61 mm (2.4-inch) full color display (240 x 320 pixels)
• Indicators: Power LED; Limiter active LED; Standby active LED; 2 x Signal LED
• Connectors: XLR Female (Analog In); XLR Male (Analog Thru); 2 x RJ45 EtherCON (Dante® and QSC SysNav™ In/Thru); 2 x PowerCON TRUE1 (AC Power Inlet/Outlet)
• AC Power Input: Universal power supply 100-240 VAC, 50-60 Hz
• AC Power Consumption: 100 VAC, X A / 120 VAC, X A / 230 VAC, X A
• Enclosure Material: 15 mm birch plywood with Polyurea coating
• Color: Black (RAL 9011)
• Grille: 16 GA powder coated steel
• Dimensions (H x W x D, without casters): 638 x 1023 x 696 mm (25.1 x 40.3 x 27.4 inches)
• Carton Dimensions (H x W x D): 1200 x 800 x 724 mm (47.2 x 31.5 x 28.5 inches)
• Net Weight: 83.5 kg (184 lb)
• Shipping Weight: 96.6 kg (213 lb)
• Included Accessories: 1 x PowerCON TRUE1 power cable
• Optional Accessories: CASTER KIT-L, SP-16x, SP-26, SP-36, COVER 1 (TBD), COVER 2 (TBD), Caster Cart (TBD), M10 KIT-W, LS-KIT-J
• Battery Chemistry: Lithium manganese dioxide
• Regulatory: CE, WEEE, UL, China RoHS, RoHS II, FCC Class B

  What is the QSC LS218?
A: The QSC LS218 is a high-output powered dual 18-inch subwoofer from the L-Class series, built for large-scale concerts, touring, and professional sound systems.

  Is the LS218 active or passive?
A: It is an active (powered) subwoofer with a built-in 5000W Class-D amplifier, so no external amp is required.

  How powerful is the LS218?
A: The LS218 delivers up to 141 dB peak SPL, making it suitable for very large venues and outdoor events.

  What is the frequency response?
A:

• -6 dB: 41 Hz – 98 Hz
• -10 dB: 35 Hz – 111 Hz

  How many drivers does the LS218 have?
A: It features two 18-inch long-excursion woofers, delivering more output than single 18" subs.

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