QSC KSub Powered Subwoofer

by QSC

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The KSub — a member of QSC's K Series — offers impressive sound quality, high wattage, and relatively light weight in an easy to transport package. Engineered by QSC's amplifier engineer team under the direction of Pat Quilter, the KSub incorporates new Class D power modules with extensive DSP processing employed throughout. The end result is a subwoofer that defies expectations based on its size and weight. The combo XLR and 1/4" inputs can handle either mic or line-level inputs, making the KSub a great addition to your rig.

QSC KSub Powered PA Speaker at a Glance:

Birch cabinets for premium sound
Birch cabinets for premium sound
The KSub is a dual-12" bandpass design, constructed of premium birch and includes high-quality, low-noise casters. The subwoofer features a threaded pole receptacle for a positive, wobble free connection to a threaded speaker pole (included).

Combo XLR and 1/4" TRS inputs accept both Mic and Line Level inputs. Up to three audio sources can be mixed internally and summed to a balanced output for "daisy-chaining" of multiple units. Separate direct outputs are also provided on each channel for additional output flexibility.

QSC KSub Powered PA Speaker Features:

Dual 12" LF drivers
1,000 watt, efficient and light-weight class-D power module
Locking IEC power cable
XLR and 1/4" connectors
Mic/Line and Line inputs with Loop-thru connectors and independent level controls.
Threaded pole socket for solid, secure pole mounting
3" Casters


  • Powered/Unpowered - Powered
  • Power Configuration - Mono-amped
  • LF Driver Size - 2 x 12"
  • Total Power - 1000W
  • Impedance Input: 40k balanced/20k unbalanced
  • Frequency Range - 48-134Hz (±6 dB)
  • Crossover Frequency - 4th order bandpass
  • Maximum Peak SPL - 130dB
  • Enclosure Material - Plywood
  • Mounting Options - Floor only (pole socket on top)
  • Inputs - Dual balanced XLR/1/4" (line level)
  • Outputs - Dual balanced XLR full range (line level)
  • Height - 26"
  • Width - 14"
  • Depth - 28.1"
  • Weight - 74 lbs