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QSC KS118 18" 3600W Active Subwoofer

BH #QSKS118NA • MFR #KS118-NA
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QSC KS118 18" 3600W Active Subwoofer
Key Features
  • For Live Stage, Theater, DJ Setups
  • 18" Long-Excursion Woofer
  • Deep Mode for Low-Frequency Extension
  • 3600W Class-D Amplifier
The QSC KS118 is a high-output active subwoofer well suited for mobile entertainment, AV rental, event production, clubs, and performance venues. The 18" direct radiating driver is powered by a 3600W Class-D amplifier, which delivers high sound pressure levels with dynamic and musical sound reproduction of very-low frequencies.
More Details

QSC KS118-NA Overview

The QSC KS118 is a high-output active subwoofer well suited for mobile entertainment, AV rental, event production, clubs, and performance venues. The 18" direct radiating driver is powered by a 3600W Class-D amplifier, which delivers high sound pressure levels with dynamic and musical sound reproduction of very-low frequencies.

The onboard DSP allows the user to save and recall variable delay and crossover settings, all the while protecting the system. Additionally, two KS118s can be deployed in a cardioid arrangement, which maximizes low-frequency output from the front, while minimizing energy around the sides and rear of the setup.

The KS118 is highly portable with four, rear-mounted, low-noise casters. The birch enclosure is rugged yet stylish and features comfortable aluminum handles and a top-mounted M20 threaded pole receptacle accepts a 35mm pole for easy vertical deployment with K.2 Series and other full-range loudspeakers.

  • High output with remarkable low-frequency performance
  • 3600W Class-D amplifier module
  • 18" long-excursion direct radiating driver
  • Omnidirectional 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
UPC: 684284076199

QSC KS118-NA Specs

Key Specs
Frequency Range/Response
35 Hz to 111 Hz (-10 dB)
41 Hz to 98 Hz (-6 dB)
Speaker Type
Active Subwoofer
Enclosure Type
Bass-Reflex
Total Output Power
3600 W
Amplifier Class
Class-D
Drivers
LF Driver
1x 18" / 45.7 cm Woofer
Performance
Frequency Range/Response
35 Hz to 111 Hz (-10 dB)
41 Hz to 98 Hz (-6 dB)
Maximum SPL
136 dB
Signal Processing
EQ & Filters
No
Alignment Delay
No
Digital Signal Processing
Delay, User Settings, Voicing Modes
Connectivity
Audio I/O
2x Combo XLR-1/4" TRS Line Input
1x XLR 3-Pin Line Thru/Output
Network I/O
No
USB I/O
No
Wireless
No
Mobile App Compatible
No
Power
AC Input Power
120 VAC, 60 Hz
AC Power I/O
1x IEC Input (Locking)
Physical
Color
Black
Mounting
1 x M20-Threaded Pole Socket (Top)
Handles
2x Each Side
Construction Material
Plywood
Environmental Resistance
No
Dimensions
30.9 x 25.2 x 20.5" / 784.9 x 640.1 x 520.7 mm (With Casters)
Weight
104 lb / 47.2 kg
Packaging Info
Package Weight
125 lb
Box Dimensions (LxWxH)
35 x 30 x 22"

QSC KS118-NA Reviews

over the sound

By Cristiano
Rated 5 out of 5
Date: 2023-09-14

sound prefect the quality

It fills and warms the sound

By Anonymous
Rated 5 out of 5
Date: 2021-08-26

My live band loves the addition of this sub. It provides warmth and fills the sound. We play acoustic guitars, cajon, vocals. I recommend it.

See any errors on this page?

what's the SPL on this?

what's the SPL on this?
Asked by: george
The QSC KS118 has a max SPL of 136 dB.
Answered by: David M
Date published: 2024-08-05

What is the warranty on the 118s?

What is the warranty on the 118s?
Asked by: Charlie
The QSC KS118 18" 3600W Active Subwoofer has a limited 3-year manufacturer warranty with an option for a registration extension: 3 years (US only).
Answered by: Daniel O
Date published: 2025-04-21
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