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The QSC KSub is designed to endure the rigors of the road for years to come. Its cabinetry is constructed of premium-grade Baltic birch and finished with a chip and scratch-resistant textured paint. You’ll find the cast aluminum handles to be comfortable and ergonomic. And KSub’s 3 inch, heavy-duty, low-noise casters will make your load-in and load-out a breeze.

Rear Panel Features:

Set the MODE switch to NORMAL for no effect, or choose DEEP for additional bass extension. Flip the PHASE switch from NORMAL to REVERSE to solve phase cancellation issues in conically-challenged rooms or to better match the internal wiring of other speakers.

The LED switch selects which mode the front-mounted LED indicates. Choose from POWER to tell at a glance if the KSub is powered on; LIMIT to monitor when the clip limiter circuit has been engaged; or OFF for situations where you don’t want the LED to be illuminated at all.

A three-LED array on the rear panel indicates POWER, LIMIT or STANDBY (Auto-Standby mode kicks in after 5 minutes of inactivity). There’s also a Master GAIN control with LED to indicate when SIGNAL is present.


QSC KSUB Powered PA Subwoofer Specifications
-Configuration: 4th Order Band pass
-Transducers: 2 x 12 inch cone transducers
-Frequency Response (-6 dB): 48 Hz – 134 Hz
-Frequency Range (-10 dB): 44 Hz – 148 Hz
-Maximum SPL: 130 dB peak
-Power Output:1000 W continuous Class D (2×500 W)
2000 W peak
-Input Impedance (ohms): XLR / 1/4 inch: 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/1/4 inch 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 over current, over temperature muting, Guard Rail
-Transducer Protection: Thermal limiting, excursion limiting
-AC Power Input: Universal power supply 100 – 240 VAC, 50 – 60 Hz
-AC Power Consumption:100 VAC, 2.3 A (1/8 Power)
-120 VAC, 2.01 A
-230 VAC, 1.13 A
-Enclosure:Material: Painted birch plywood
-Finish: Black textured paint

QSC KSUB (12 Inch 1000 Watt Active Powered Subwoofer)