QSC KS118
3,600-watt Powered Subwoofer with 18″ LF Driver, 2 XLR/TRS Inputs, Omni/Cardioid Modes, DEEP Mode, Adjustable Crossover/Delay, Savable/Recallable Scenes, M20 Threaded Pole Socket, and Swivel Casters
$2,499.99
Rent this instead?
Pickup is available Wednesday through Saturday. Rentals return the following Monday or Tuesday.
Product Details
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 on-board 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 35 mm loudspeaker pole accessories available
Buy or Rent the KS118 — Which Makes Sense for You?
If you regularly need serious low-end for a venue, mobile rig, or production company, buying the KS118 makes sense — it’s a long-term investment backed by QSC’s warranty and Metro’s in-house service support. If you need this exact high-output subwoofer for a one-off show, wedding, or corporate event, renting by the day gets you the same unit without the upfront cost.
Whether you buy or rent, it’s the identical KS118 — the same 18″ driver, the same 3600W Class-D amplifier, the same 136dB peak output. Metro doesn’t maintain a separate, lower-spec rental fleet; what you rent is what you’d buy.
QSC KS118 Use Cases
- Mobile DJs and event production needing serious low-end reinforcement
- Live bands and clubs needing high-output, controlled bass
- Weddings and private parties needing a dance-floor-ready subwoofer
- Rental companies and production teams stocking a premium powered sub
- Cardioid deployments (pair of KS118s) for controlled stage bass bleed
Why Buy or Rent the KS118 From Metro Sound & Lighting
Metro Sound & Lighting isn’t a catalog-only retailer. We stock, service, and repair QSC gear in-house, so you’re backed by real technical support before and after the sale — not a call center. Whether you’re outfitting a permanent install, adding to your touring rig, or renting for a single event, our team can spec the right configuration, handle setup, and keep it running. We also offer B2B and integrator pricing for churches, schools, and production companies buying or renting in volume.
You can view more powered subwoofer options in our Powered Subwoofers category, or see full specs on the official QSC KS118 product page.
Additional information
| Power Output | 3,600 W Peak (Class D) |
|---|---|
| Max SPL | 136 dB @ 1m Peak |
| LF Driver | 18 in Long-Excursion Direct Radiating Driver |
| Frequency Extension | Down to 35 Hz (DEEP Mode) |
| Radiation Modes | Omnidirectional or Cardioid (min 2 units for cardioid) |
| Connectivity | 2x Locking XLR/TRS Combo Input, 2x XLR Loop-Thru Output |
| Pole Mount | M20 Threaded Socket (35mm Pole) |
| Dimensions | 25.2 x 20.5 x 30.9 in (640 x 520 x 785 mm) |
| Weight | 104 lb |
