QSC KS118 18" 3600W Active Subwoofer

MSRP: $1,799.99
(You save $300.99 )
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The KS118 is a very high output active subwoofer producing impressive low frequencies for mobile entertainment, AV production, clubs and performance venues. Featuring an 18" direct radiating driver powered by a 3600W Class D amplifier, the KS118 delivers high sound pressure levels with dynamic and musical sound reproduction of very low frequencies.

On-board DSP optimizes and protects system performance as well as offers advanced capabilities such as the ability to array two units in a cardioid arrangement. Highly transportable, the rugged enclosure features comfortable handles and four low noise casters. An M20 threaded pole receptacle accepts a 35mm pole for easy vertical deployment with full-range loudspeakers.

  • Configuration: Direct Radiating
  • LF Transducer: 18", Cone
  • Frequency Response (-6 dB): 41 Hz - 98 Hz
  • Frequency Range (-10 dB): 35 Hz - 111Hz
  • Nominal Coverage Angle: Omni-directional or cardioid radiation modes (cardioid setup requires min. 2 units)
  • Maximum Rated SPL: 136 dB @ 1m (peak)
  • Amplifier: Class D 3600 W (peak)
  • Cooling: Low-noise, variable speed fan
  • Controls: Power On/Off, Gain Control, Rotary encoder, 2x selection buttons
  • Indicators: 2x Power LED (front and rear), Input Signal LED, Limiter active LED
  • Connectors: 2x locking XLR/F 1/4" combo, 2x XLR/M (Loop-Thru Output), 1x Locking IEC Power Connector
  • AC Power Input: Universal power supply 100-240 VAC, 50 - 60 Hz
  • AC Power Consumption (1/8th Power): 100 VAC, 3.6 A/120 VAC, 3.0 A/240 VAC, 1.7A
  • Enclosure: 18mm Birch Plywood
  • Color: Black
  • Grille: 16-gauge Black Powder Coated Steel
  • Dimensions: 640 x 520 x 785 mm (incl. casters), 25.2 x 20.5 x 30.9 inches (incl. casters)
  • Net Weight: 104 lbs


  • Very high output with impressive low frequency performance
  • 3600 W Class D Amplifier module
  • 18" long excursion direct radiating driver
  • Omni-directional or cardioid radiation modes (cardioid setup requires min. 2 units)
  • Selectable DEEP mode for extremely low frequency extension
  • Adjustable crossover and delay
  • Scenes for commonly-used applications that can be saved/recalled
  • Refined, professional and elegant appearance in any application
  • Rugged painted wood enclosure for lasting durability
  • Vertical or horizontal deployment (M20 threaded pole receiver for vertical setup)
  • Four low-noise, heavy-duty casters
  • Optional transport cover, temporary weather cover, KS-LOC security cover and 35mm loudspeaker pole accessories available
  • 6-Year Warranty with product registration