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1000W active, portable subwoofer; dual 12-inch woofers; 4 large, swivel casters

Brand New

Brand New

Regular Price: $1,079.99

Special Price: $899.99

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Product Description for the QSC KSUB

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.

Remote gain control capability is offered via a potentiometer (not included) connected to the on-board Euroblock connector. In an installed application, multiple K Series speakers can be "daisy-chained" for total gain control from a single remote pot. Auto-standby mode is engaged after 5 minutes of inactivity.

Extensive DSP

  • DMT (Directivity Matched Transition) provides for matched LF and HF coverage across the entire listening area, eliminating unnatural "dead" or "hot" frequency zones.
  • Intrinsic Correction, first featured in our high-end line-array products maps 65-75 spacially-averaged measurements to IIR and FIR filters that actively adjust time, frequency and amplitude response to a maximally flat bandpass target. The result is a speaker that behaves equally well across the entire sound field.
  • DEEP and excursion limiting allow for extended low-frequency response by actively managing low-frequency transients without degradation of the underlying signal or adjacent frequencies.
  • GuardRail protection, first introduced on our GX Series amplifiers protects both the amplifier module and your performance from unnatural and destructive clipping.



  • Dual 12” subwoofer drivers
  • Maximum SPL 130 dB peak
  • Lightweight portable powered speaker with legendary QSC amplifier power and reliability
  • 1000-watt continuous Class D power modules in all models
  • Extensive DSP enhances system performance
  • Attractive and professional appearance
  • Comfortable ergonomic handles
  • Rugged birch plywood enclosure
  • Threaded pole socket
  • Speaker mounting pole included (35 mm diameter, 26.4 in / 67 cm long, M20 thread)
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  • Configuration       4th-order bandpass
  • Transducers
  • Low-frequency    
  • 2 × 12" cone transducers
  • Frequency Response (-6 dB)             48 Hz - 134 Hz
  • Frequency Range (-10 dB) 44 Hz - 148 Hz
  • Maximum SPL1   130 dB peak
  • Amplifiers
  • Power Output2     1000 W continuous Class D (2 × 500 W)
  • 2000 W peak
  • Input Impedance : XLR / ¼": 40 kΩ balanced / 20 kΩ unbalanced
  • Controls : Power, Gain, LF Mode (Normal/Reverse), Front LED (On/Off/Limit)
  • Indicators : Power, Signal, Standby, Limit
  • Connectors : Dual balanced female XLR/¼" line level input, Dual Balanced male XLR full range line level out, Remote gain control, Locking IEC power connector
  • Cooling : On demand, 50 mm variable speed fan
  • Amplifier Protection : Thermal limiting, output overcurrent, overtemperature muting, GuardRail™
  • Transducer Protection : Thermal limiting, excursion limiting
  • AC Power Input : Universal power supply 100–240 VAC, 50 to 60 Hz
  • AC Power Consumption
  • (1/8 of full power) : 100 VAC, 2.3 A
  • 120 VAC, 2.01 A
  • 230 VAC, 1.13 A
  • Enclosure
  • Material : Painted birch plywood
  • Finish : Black textured paint
  • Dimensions (HWD) inches : 26 × 14 × 28.1
  • Dimensions (HWD) mm : 665 x 356 x 714
  • Weight (Net) : 74 lb / 33.6 kg
Brand QSC
Weight 89.6000
Dimensions (WxHxD) 26" x 14" x 28.1" (including casters)


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