QSC KS212C Powered 3600W Dual 12" Cardioid Subwoofer

The QSC KS212C is a single-box powered cardioid subwoofer designed to “keep bass in its place” for mobile entertainers, AV production, rental fleets, and modest-size venues. Inside, two dual 12-inch drivers operate in a 6th-order bandpass configuration and are driven by a 3600W Class-D amplifier (2 × 1800 W peak), generating up to 132 dB peak SPL with a controlled cardioid pattern. That design yields 15 dB rear rejection (at 70 Hz), reducing onstage low-frequency buildup while focusing impact toward the audience. Frequency response is 44–104 Hz (–6 dB) with a 39–118 Hz range (–10 dB), offering tight, musical punch that partners naturally with modern tops in portable PA systems.

Setup is fast and repeatable. Onboard DSP provides a variable crossover, delay, and savable/recallable scenes, while QSC’s Intrinsic Correction optimizes response and protection. The back panel features two locking XLR/TRS combo inputs and two XLR loop-through outputs, plus clear front/rear power LEDs, signal, and limiter indicators. Cooling is handled by a low-noise variable-speed fan, and universal 100–240 VAC power simplifies global deployments.

Road-ready construction includes a 15 mm birch plywood cabinet finished in black (RAL 9011), an internal woofer cover, and M20 pole sockets on the top and side for vertical or horizontal use with a 35 mm pole. Four heavy-duty casters make load-ins civil, while compact dimensions—24.5 × 15.5 × 33.5 inches (H×W×D)—and an 88.5 lb net weight keep transport manageable without sacrificing performance. Register within 30 days to activate QSC’s 6-year warranty, a strong signal of reliability for daily gigging and production work. For anyone who needs controlled, high-output low end in a single enclosure, KS212C delivers cardioid benefits without the complexity of multi-box arrays.