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QSC LS118 18" 4000 Watt Active Subwoofer

The QSC LS118 Active Subwoofer features wheels for portability, an 18" long excursion direct radiating driver, a 138 DB peak SPL, an Acoustic Linear Phase design, & selectable DEEP Mode

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    QSC LS118 18" 4000-Watt Active Subwoofer

    The QSC LS118 combines powerful low-end performance with smart engineering. This 18-inch subwoofer delivers 4000 watts of controlled, chest-thumping bass that your audience will feel with every beat. What sets it apart is its custom-designed 18-inch driver, built for exceptional excursion and airflow. Paired with a high-efficiency 4000W Class D amplifier featuring Power Factor Correction, it ensures maximum output with optimal efficiency.

    QSC LS118 Embracing the Subwoofer Life

    Embracing the Subwoofer Life

    When it comes to shaking walls and setting the vibe, not all subwoofers are created equal. And the QSC LS118 proves it with features that’ll blow you away — almost literally.

    • 138 dB Peak Output: This thing hits hard enough to wake the neighbors three blocks over, delivering crystal-clear low frequencies that you'll feel as much as hear.
    • Acoustic Linear Phase (ALP) Design: All your QSC speakers play nice together, creating a cohesive sound field instead of competing frequencies that muddy your mix.
    • QSC SysNav App Control: Configure, monitor, and fine-tune your entire setup from your phone — because who has time to crawl around adjusting knobs mid-show?

    Smart Setup, Smarter Sound

    The LS118 isn't just about raw power — it's about putting that power exactly where you need it. The cardioid configuration option lets you focus your low-end forward while keeping it off your stage, so your drummer can actually hear themselves think.

    • Cardioid Array Capability: Use two or more units to create directional bass that hits your audience hard while keeping stage bleed to a minimum.
    • Dante Network Integration: Stream digital audio over IP and integrate seamlessly with Q-SYS ecosystems — perfect for complex installations where every connection counts.
    • Omni or Cardioid Modes: Switch between full 360-degree coverage or focused directional output depending on your venue and needs.
    QSC LS118 Smart Setup, Smarter Sound
    QSC LS118 Built Like a Tank, Moves Like a Dream

    Built Like a Tank, Moves Like a Dream

    This subwoofer is designed for the real world, where gear gets loaded, unloaded, and moved more times than you'd like to count. The rugged wooden enclosure with Polyurea coating shrugs off the kind of treatment that would leave lesser subs looking like they've been through a blender.

    • Heavy-Duty Casters: Four low-noise wheels that actually roll smoothly, even when you're navigating tight backstage areas.
    • Flexible Deployment Options: Mount it vertically, horizontally, ground-stack it, or pole-mount it — the M20 threaded receivers and mounting options give you the flexibility to adapt to any venue.
    • Daisy-Chain Connections: Link analog, Dante digital audio, and AC power between units with clean, professional connections that won't fail when you need them most.

    The Lowdown on the Low End

    The QSC LS118 delivers the kind of low-end authority that turns good sound systems into unforgettable experiences. Whether it's running a simple plug-and-play setup or managing a complex networked installation, this subwoofer gives you the power, precision, and reliability to make every show count.

    QSC LS118 The Lowdown on the Low End

    QSC LS118 Features:

    • Purpose-designed 18-inch-long excursion driver for maximum low-frequency output
    • 4000W peak Class D amplifier with Power Factor Correction
    • 138 dB peak SPL output with exceptional low frequency performance
    • QSC Acoustic Linear Phase (ALP) design for coherent multi-speaker deployment
    • QSC SysNav app for wireless control, monitoring, and signal processing
    • Dante network integration for digital audio-over-IP connectivity
    • Selectable DEEP mode for extended low frequency response
    • Cardioid and omni-directional radiation pattern options
    • Rugged Polyurea-coated wooden enclosure with heavy-duty casters
    • Industry-leading 6-year extended warranty with product registration

    CALIFORNIA PROPOSITION 65 WARNING

    WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

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    QSC LS118 18" 4000 Watt Active Subwoofer Specifications

    QSC LS118 18" 4000 Watt Active Subwoofer Specifications
    Product Specifications

    QSC LS118 18" 4000 Watt Active Subwoofer Specifications

    • Configuration: Direct radiating, active subwoofer
    • LF Transducer: 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 min. 2 units)
    • Maximum Rated SPL (peak): 138 dB @ 1 m
    • Amplifier (peak): Class D, 4000 W
    • Cooling: Low noise, variable speed fan
    • Controls:
      • Rotary push encoder
      • 2 x Push button (Menu, ID)
    • Display Screen: 61 mm (2.4-inch) Full color display area (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, 3.6 A / 120 VAC, 3.0 A / 230 VAC, 1.7 A
    • Enclosure Material: 15 mm birch plywood with Polyurea coating
    • Attachment Points:
      • 8 x M10 (for individual vertical or horizontal suspension/flying)
      • 2 x M20 (for vertical or horizontal loudspeaker pole or ground-stack deployments)
    • Color: Black (RAL 9011)
    • Grille: 16 GA Powder coated steel
    • Dimensions (H x W x D): 640 × 520 × 790 mm/ 25.2 × 20.5 × 31.1 inch
    • Net Weight: 50 kg (110 lb) including casters
    • Shipping Weight: 62.6 kg (138 lb)
    • Included Accessories: 4 x Heavy-duty, low noise 4-inch casters, 1 x PowerCON TRUE1 power cable
    • Regulatory: UL, CE, FCC Class B
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