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QSC KS212C Active Dual 12" Cardioid Subwoofer

A compact and powerful dual 12" active sub that is the 'point and shoot' of bass.

Key Features:

  • 3600 Watt Class D power module 
  • Dual 12-inch long excursion drivers; Dual 6th order band-pass design 
  • 15 dB SPL attenuation front-to-rear  
  • Two M20 threaded sockets (one on top, one on side) accept 35 mm speaker pole 
  • Four low-noise, heavy-duty casters 
  • HxWxD = 26” x 15” x 28” (665 x 381 x 714 mm) 
  • 90 lbs (41 kg) 

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    Product Code: 300025454

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    The new KS212C sub is a genius box, the direction you point it in, is where the bass goes. More importantly, you don't get unwanted bass behind it either making it perfect for DJ's eliminating unwanted reverberation in the booth. It can be used standing upright or laying flat and even use multipes stacked.

    The KS212C subwoofer represents the world’s first-in-class single-box powered cardioid subwoofer solution for highly portable entertainment and installation applications.

    A breakthrough in innovation and design, the 3,600 Watt KS212C subwoofer uniquely provides all the benefits of cardioid deployment in a single, compact enclosure. “Keeping bass in its place” for mobile entertainers, AV production and rental professionals, as well as modestly-sized performance venues, the KS212C subwoofer is unparalleled in its ability to manage low frequencies on the stage, or any application where undesirable low frequency energy needs to be minimized.


    Powered by a 3,600 Watt Class D amplifier, processed with the latest DSP technology, and featuring dual 12-inch long excursion drivers each arranged in a 6th order bandpass chamber, these components all combine seamlessly to produce a staggering 15 dB more output at the front of the cabinet than at the rear. Highly portable, the cabinet features comfortable, aluminum handles and four, rear-mounted casters. Two M20 sockets accept a 35mm speaker pole in other horizontal or vertical orientation.


    Most subwoofers radiate energy around the entire
    enclosure, leading to undesirable LF build-up on stage
    and wasted energy around the sides and rear of the system


    The KS212C subwoofer keeps "bass in its place"
    with a single-box cardioid array that produces an
    amazing 15 dB more output at the front than at the rear

    Configuration Dual 6th-order bandpass cardioid subwoofer
    LF Transducer 2 x 12” (305 mm), cone
    Frequency Response (-6 dB) 44 Hz - 104 Hz
    Frequency Range (-10 dB) 39 Hz - 118 Hz
    Nominal Coverage Angle 180˚ Cardioid (15dB rear rejection @ 70Hz)
    Maximum Rated SPL1 132dB @1m, peak
    Amplifier Class D
    2 x 1800W (peak)
    Cooling Low-noise, variable speed fan
    Controls Power
    Rotary encoder
    2 x selection buttons
    Indicators 2 x Power LED (front and rear)
    Input Signal LED 
    Limiter active LED
    Connectors 2 x locking XLR/F ¼” combo
    2 x XLR/M (Loop-thru Output)
    1 x locking IEC power connector
    AC Power Input Universal power supply 100 – 240 VAC, 50 – 60 Hz
    AC Power Consumption 1/8th power
    Enclosure Details
    Enclosure 18mm birch plywood
    Color Black (RAL 9011)
    Grille Internal woofer cover
    Dimensions (HWD) inches 24" × 15" × 19.6"
    Dimensions (HWD) mm 610 mm x 381 mm x 498 mm
    Net Weight 40.1 kg (88.4 lbs)
    Shipping Weight TBD
    Regulatory CE, WEEE, UL, CHina RoHS, RoHS II, FCC Class B
    Optional Accessories KS212C Cover, KS-LOC Lock-Out Cover
    SP-16X Extension Pole, SP-36 Speaker Pole

    Peak SPL is measured on-axis at 1m, pink noise crest factor 10dB, unweighted Continuous SPL is based on theoretical calculations based upon transducer sensitivity and peak available power (for comparison purpose and in accordance with common industry practice. 

    All specifications are subject to change without notice.

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