KSUB Active Loudspeaker - Batts Audio, Video and Lighting

KSUB Active Loudspeaker

QSC Audio, Inc.


  • Lightweight portable powered speakers with legendary QSC amplifier power and reliability

  • 1000 watt continuous Class D power module

  • Extensive DSP enhances system performance

  • Attractive and professional appearance

  • Rugged birch plywood enclosure

  • Comfortable ergonomic handles

  • Threaded pole socket with speaker pole included

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). 

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.

    Configuration 4th Order Bandpass

    2 x 12" cone transducers
    Frequency Response (-6 dB) 48 Hz - 134 Hz
    Frequency Range (-10 dB) 44 Hz - 148 Hz
    Maximum SPL1 130 dB peak
    Power Output2 1000 W continuous Class D (2x500 W) 
    2000 W peak
    Input Impedance (ohms) XLR / ¼": 40k balanced / 20k unbalanced
    Controls Power, Gain, LF Mode (Normal/DEEP™), Polarity (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 - 60 Hz
    AC Power Consumption
    (1/8 Power)
    100 VAC, 2.3 A
    120 VAC, 2.01 A
    230 VAC, 1.13 A
    Material Painted birch plywood
    Finish Black textured paint
    Dimensions (HWD) 26" x 14" x 28.1" (including casters)
    665 mm x 356 mm x 714 mm
    Weight (Net) 74 lb / 33.6 kg
    Available Accessories KSub COVER