QSC KS118 Powered Subwoofer (3600 Watts, 1x18")

This monster sub handles any event! Get 3600 watts of Class D power pushing an 18" woofer, adjustable crossover, and cardioid mode when you pair two units.

The QSC KS118 is a very high output active subwoofer producing impressive low frequencies for mobile entertainment, AV production, clubs and performance venues. Featuring an 18-inch direct radiating driver powered by a 3600 Watt 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 35 mm pole for easy vertical deployment with full-range loudspeakers.


- 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
- read more 6-Year Warranty with product registration

Compare all QSC's KS series powered subwoofers in this video overview:
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- Configuration: Direct Radiating
- LF Transducer: 18-inch (460 mm), 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 SPL1: 136 dB @ 1 m (peak)
- Amplifier: Class D
- 3600 W (peak)
- Cooling: Low-noise, variable speed fan
- Controls: Power On/Off Gain Control
- Rotary encoder
- 2 x selection buttons
- Indicators: 2 x Power LED (front and rear) Input Signal LED
- Limiter active LED
- Connectors: 2 x locking XLR/F 1/4 in combo 2 x XLR/M (Loop-Thru Output)
- 1 x 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, 1.7 A
- Enclosure Details
- Enclosure: 18 mm Birch Plywood
- Color: Black (RAL 9011)
- Grille: 16-gauge Black Powder Coated Steel
- Dimensions (HxWxD): 640 x 520 x 785 mm (incl. casters)
- 25.2 x 20.5 x 30.9 inches (incl. casters)
- Net Weight: (including casters) 47 kg (104 lbs)
- Shipping Weight: 56.5 kg (124.5 lb)
- Regulatory: CE, WEEE, UL, China RoHS, RoHS II, FCC Class B
- Included Accessories: 4 x Low-Noise, Heavy Duty Casters
- Optional Accessories: KS118-CVR Transport Cover, KS-LOC Lock-Out Cover
- SP-26 and SP-36 Loudspeaker Poles, SP-16X Extension Pole
Dimensions and Weight in Packaging
Single Speaker
Shipping Weight: 120.25 lbs
Shipping Dimensions: 36 x 30 x 23 in
Manufacturer Part Number (MPN): KS118-NA

For support or warranty questions, please contact the manufacturer:
Phone: 800-772-2834
Web: http://qsc.com/support

Reviewers gave this product an overall rating of 5 out of 5 stars. (13 ratings)
Submitted December 2, 2019 by Mario Ingles in Hempstead, NY

"All I can say is WOW!"

Overall: 5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
This subwoofer definitely rocks! The bass on this thing is insane and it really took a beating and I never saw the clipping come on, even the venue kept telling me to lower the bass, I really highly recommend it. Transportation was very easy with the built in wheels. Again, it you are looking to upgrade, look no more and go with QSC KS 118!

Musical Background:

Mobile DJ

Musical Style:

Open format
109 of 114 people (96%) people found this review helpful. Did you?
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