LS218

The LS218 is a next-generation, intelligent, active subwoofer featuring a brilliant combination of leading-edge innovation, refined engineering and unparalleled ease of use in an easy-to-deploy package.

Delivering extraordinary audio experiences and exceptional performance via system intelligence and premium components, the LS218 is the result of a deep understanding of customer needs and application requirements. The LS218 is easy to configure and deploy for applications ranging from simple, portable, plug-and-play setups, to demanding, networked, high-tech AV productions and fixed installations.

Featuring QSC Acoustic Linear Phase (ALP) design, which permits effortless combination and coherent deployment of QSC loudspeakers within the same sound system, the LS218 also provides daisy-chain connections for analog, networked digital audio (Dante® ) and AC power (PowerCON TRUE1). Two or more LS218 can be configured in a cardioid arrangement, maximizing low frequency output in front while minimizing unwanted energy around the sides and rear of the system.

Together with the LA108 or LA112 active line array loudspeakers, the LS218 can be deployed with either an array frame/ground-stack adapter or using loudspeaker poles in both horizontal and vertical orientations.

The LS218 is backed by a 6 Year Warranty when registered within 30 days of purchase.

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Key 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

  • 6 Year Warranty when registered within 30 days of purchase

  • Available Mid-2026

Technical Specifications

  • Model: LS218

    Configuration: Direct radiating, active subwoofer

    LF Transducer: (2 ×) 460 mm (18-inch), cone

    Frequency Response (-6 dB): 35–98 Hz (DEEP™ 32–98 Hz)

    Frequency Range (-10 dB): 33–111 Hz (DEEP™ 29–111 Hz)

    Nominal Coverage Angle: Omni-directional or cardioid radiation modes (cardioid setup requires min. 2 units)

    Maximum Rated SPL¹ (peak): 141 dB @ 1 m (peak)

    Amplifier (peak): Class D, 5000 W

    Cooling: Low noise, variable speed fan

    Controls: Rotary push encoder, 2 × Push buttons (Menu, ID)

    Display Screen: 61 mm (2.4-inch) Full color display area (240 × 320 pixels)

    Indicators: Power LED, Limiter active LED, Standby active LED, 2 × Signal LED

    Connectors: XLR Female (Analog In), XLR Male (Analog Thru), 2 × RJ45 EtherCON (Dante® and QSC SysNav™ In/Thru), 2 × PowerCON TRUE1 (AC Power Inlet/Outlet)

    AC Power Input: Universal power supply 100–240 VAC, 50–60 Hz

    AC Power Consumption²: 100–240 V @ 3.7 A–1.8 A, 50/60 Hz

    Enclosure Material: 15 mm birch plywood with Polyurea coating

    Color: Black (RAL 9011)

    Grille: 16 GA Powder coated steel

    Dimensions (H × W × D) (Without Casters): 638 × 1023 × 696 mm / 25.1 × 40.3 × 27.4 inches

    Carton Dimensions (H × W × D): 1200 × 800 × 724 mm / 47.2 × 31.5 × 28.5 inches

    Net Weight: 83.5 kg (184 lb)

    Shipping Weight: 96.6 kg (213 lb)

    Included Accessories: 1 × PowerCON TRUE1 power cable

    Optional Accessories: CASTER KIT-L, SP-16X, SP-26, SP-36, 218-CVR, 218-CVRX, 218-CART, M10 KIT-W, LS-KIT-J

    Battery Chemistry: Lithium manganese dioxide

    Regulatory: CE, WEEE, UL, China RoHS, RoHS II, FCC Class B

    California Prop 65: Warning Information