KS212C
Powered Cardioid
Subwoofer
KEY FEATURES
• “First-in-class” compact single-box cardioid
solution
• 3600 Watt Class D amplifier module
• Cardioid pattern provides -15 dB SPL
attenuation front-to-rear
• Dual 12-inch, long-excursion drivers; Dual
6th order band-pass design
• Variable crossover and savable/recallable
Scenes for commonly-used applications
• TFR™ (Turbulent Flow Reduction) port
design provides optimal resonant tuning
and high velocity air flow
• Refined, professional appearance looks
great in any application
• Rugged painted wood enclosure for long
life and lasting durability
• Deployment in either vertical or horizontal
positions with M20 speaker pole fittings
(36-inch speaker pole included)
• Optional KS LOC security cover prevents
unauthorized tampering of controls
• Complete EASE and CAD information
available online
• 6-Year Warranty*
The Problem:
Typically, subwoofers are omnidirectional,
radiating sound equally in all directions. This
results in troublesome, unwanted low-frequency
build-up on stage as well as undesired, wasted
LF energy at the rear of the system. In more
recent years, concert sound providers have
been able to create cardioid (heart-shaped)
coverage of their subwoofer arrays through
some clever manipulation of placement, delay
and polarity, redirecting desired LF energy
forward and minimizing energy at the sides
and rear. Unfortunately, this technique is costly
and requires multiple enclosures, amplifiers
and processors.
The KS212C Solution:
Representing a breakthrough in innovation
and design, the KS212C uniquely provides
all the benefits of a cardioid subwoofer
array, but 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 is
unparalleled in its ability to manage low
frequencies on the stage, or any
application where undesirable low
frequency energy needs to be minimized.
KS212C
Musicians/Bands ∙ Clubs/Venues ∙ DJs/Dance · AV Rental/Production
The KS212C is the world’s first-in-class single-box powered cardioid
subwoofer solution for highly portable entertainment and installation applications.
KS212C Cardioid Subwoofer Front Back
-15dB
Typical Subwoofer Energy Dispersion
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.
Cardioid Subwoofer Energy Dispersion
The KS212C keeps “Bass in its Place” with a single-box cardioid
solution that produces an amazing 15 dB more output at the front than
at the rear.
KS212C
Configuration: Dual 6th-Order Bandpass Cardioid Subwoofer
LF Transducer: 2 x 12-inch (305 mm), Cone
Frequency Response (-6 dB): 44 Hz - 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 On/Off
Gain Control
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-inch 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) 100 VAC, 3.6 A / 120 VAC, 3.0 A / 240 VAC, 1.7 A
Enclosure Details
Enclosure: 18 mm Birch Plywood
Color: Black (RAL 9011)
Grille: Internal Woofer Cover
Dimensions (HxWxD): 24.5 x 15.5 x 33.5 inches
622 x 394 x 851 mm
Net Weight: 40.1 kg (88.5 lbs)
Shipping Weight: 48.5 kg (107 lbs)
Regulatory: CE, WEEE, UL, China RoHS, RoHS II, FCC Class B
Included Accessories: 4 x Low-Noise, Heavy-Duty Casters
36-inch Speaker Pole
Optional Accessories: KS212C Cover, KS LOC Lock-Out Cover
SP-16X Extension Pole
KS212C Specifications
QSC, LLC. 1675 MacArthur Boulevard Costa Mesa, CA 92626 USA. ©2017 QSC, LLC. All rights reserved. QSC and the QSC logo are registered trademark s of QSC, LLC in the U.S. Patent and Trademark Office and other countries. DMT, Intrinsic Correction,
and the World of K logo are trademarks of QSC, LLC. Specifications subject to change without notice.
+1·800·854·4079 | +1·714·754·6175 | WWW.QSC.COM
1 Peak SPL is measured on-axis at 1 m, pink noise crest factor 10 dB, 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.
* With product registration. Visit qsc.com for full details.
Specifications subject to change without notice.