QSC KS212C: 12" Cardioid Dual Subwoofer
QSC KS212C: 12" Cardioid Dual Subwoofer
QSC KS212C: 12" Cardioid Dual Subwoofer

QSC KS212C: 12" Cardioid Dual Subwoofer

Regular price$3,129.00
Shipping calculated at checkout.

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  • Backordered, shipping soon

The QSC KS212C 12" Cardioid Dual 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 3600 W KS212C 12" Cardioid Dual 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.


  • 3600 W class-D power module 
  • Dual 12" long excursion drivers; Dual 6th order band-pass design 
  • 15 dB SPL attenuation front-rear  
  • 2 M20 threaded sockets (one on top, one on side) accept 35 mm speaker pole 
  • 4 low-noise, heavy-duty casters 
  • H x W x D = 25" x 16" x 34" (622 x 394 x 851 mm) 
  • 89 lbs (40.1 kg) 

Powered by a 3600 W class-D amplifier, processed through the latest DSP technology, and featuring Dual 12" 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.  2 M20 sockets accept a 35 mm speaker pole in other horizontal or vertical orientation.

Specifications KS212C
Configuration Dual 6th order bandpass Cardioid Subwoofer
LF transducer 2 x 12" (305 mm), cone
Frequency response (-6 dB) 44 -104 hz
Frequency range (-10 dB) 39-118 hz
Nominal coverage angle 180˚ Cardioid (15 dB rear rejection @ 70 hz)
Maximum rated SPL1 132 dB @1 m, peak
Amplifier class-D
2 x 1800 W (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 1 / 4" 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 / 8 power
Enclosure details
Enclosure 18 mm birch plywood
Color black (RAL 9011)
Grille internal woofer cover
Dimensions (HWD) (") 25" × 16" × 34"
Dimensions (HWD) (mm) 622 mm x 394 mm x 851 mm
Net weight 40.1 kg (89 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

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