QSC KS118 18-Inch Compact Powered Subwoofer

Ideal for mobile entertainers, AV productions, clubs, and performance venues, QSC’s KS118 subwoofer is as powerful as it is compact. Delivering high output that can be used singly or paired with other units, this high-output sub features multiple placement and coverage options, making it a versatile piece of gear that’s easy to incorporate in sound systems of all shapes and sizes.

The KS118 can be used as a sound system’s only sub or paired with other units to cover more area and afford more low-frequency energy. It boasts an onboard DSP menu that enables you to array two or more KS units in a forward/backward cardioid configuration with 15 dB of rearward rejection. This onboard DSP also optimizes and protects system performance. From the menu, select “Forward” for the units toward the listener and “Rear” for the units facing away. The menu also allows you to specify side-by-side or ground-stacked setups.

When used as the only subwoofer in the setup, the KS118 is capable of supporting a stereo pair of top loudspeakers. If possible, place the sub in the center between the pair for the most even coverage; if this layout isn’t practical for your space, placing the subwoofer off to the side will usually produce satisfactory results as well. An M20 threaded pole receptacle accepts a 35 mm pole (sold separately), allowing you to vertically array the sub with full-range loudspeakers.

Powered by a 3600W Class D amplifier driving a single 18” direct radiating driver, the KS118 delivers high SPL with dynamic sound reproduction of very low frequencies. Built for confident transportability, this sub boasts a rugged enclosure with ergonomic handles for easy lifting, as well as four low-noise casters that save your back and allow you to roll the sub where it needs to go.

More about QSC’s KS Powered Subwoofers

The KS series of subwoofers from QSC boast effortless portability, versatile mounting and positioning options, and a plethora of features that ensure your audio sounds its best. Each KS model includes a multi-function digital display that gives you at-a-glance feedback on settings and allow you to make precise adjustments on various functions such as scenes, crossover, and delay.

QSC KS118 Features

• Very high output with impressive low frequency performance
• 3600 Watt Class D amplifier module
• 18 inch (460 mm) 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, KS-LOC security cover and 35 mm loudspeaker pole accessories available

• KS118 18" Compact Powered Subwoofer1
• Six Year Warranty with product registration1
• Low-Noise, Heavy Duty Casters4

• General
  • Configuration: Direct Radiating
  • LF Transducer: 460 mm (18 in), 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: 136 dB @ 1 m (peak)
• Amplifier
  • Class D
  • 3600W (peak)
• CoolingLow-noise, variable speed fan
• Controls
  • Power On/Off
  • Gain Control
  • Rotary encoder
  • 2 × selection buttons
• Indicators
  • 2 × Power LED (front and rear)
  • Input Signal LED
  • Limiter active LED
• Connectors
  • 2 × locking XLR/F ¼ inch combo
  • 2 × XLR/M (Loop-thru Output)
  • 1 × locking IEC power connector
• AC Power
  • AC Power Input: Universal power supply 100 – 240 VAC, 50 – 60 Hz
  • AC Power Consumption (⅛ power): 100 VAC, 3.6 A / 120 VAC, 3.0 A / 240 VAC, 1.7 A
• Enclosure Details
  • Enclosure 18 mm birch plywood
  • Color: Black (RAL 9011)
  • Grille: 16-gauge Black Powder Coated Steel
  • Speaker Dimensions (H × W × D): 25.2 × 20.5 × 30.9 inches (640 × 520 × 785 mm)
  • Carton Dimensions (H × W × D): 22.5 × 29.3 × 35.3 inches (572 × 743 × 896 mm)
  • Net Weight (including casters) 104 lbs (47 kg)
  • Shipping Weight: 124.6 lbs (56.5 kg)
  • Regulatory: CE, WEEE, UL, China RoHS, RoHS II, FCC Class B