QSC KS212C K Cardioid Dual 12" Powered Subwoofer

The QSC KS212C cardioid subwoofer redefines low-frequency control by delivering a groundbreaking solution for bass management in both mobile and installed audio setups. As the world's first single-box powered cardioid subwoofer, it eliminates the common issue of wasted low-end energy radiating behind the speaker. At its core, a 3,600W Class-D amplifier powers dual 12" long-excursion drivers housed in a 6th-order band-pass enclosure, generating a remarkable 15dB more output in front than behind the unit. This design ensures the bass stays directed toward the audience, offering pristine low-end performance without interfering with stage sound or DJ setups.

Cardioid Design for Focused Low End

The KS212C's innovative cardioid design provides unprecedented control over low-frequency dispersion. Unlike traditional subwoofers that radiate sound in all directions, this model directs the majority of its bass energy forward while minimizing unwanted noise behind the unit. Professional-grade DSP technology enhances this effect, allowing the subwoofer to deliver a focused and impactful sound for audiences while keeping the stage or booth free of bass interference. This precision ensures improved clarity and more immersive audio experiences in live sound applications.

High-Powered Amplification for Deep Bass

Powering the KS212C is a robust 3,600W Class-D amplifier, driving two 12" long-excursion drivers with incredible efficiency. These drivers are arranged in a 6th order bandpass design, allowing the subwoofer to produce tight, chest-thumping bass that extends to the lowest frequencies. This advanced configuration ensures a dynamic low-end response that is both impactful and controlled, making it ideal for high-energy performances or bass-heavy playback. The amplifier's clean power output keeps distortion at bay, providing consistent performance at high volumes.

Professional DSP for Optimized Performance

Advanced DSP technology is at the heart of the KS212C, ensuring optimal performance in every scenario. The onboard processing intelligently manages system parameters such as phase alignment, crossover points and time delays for seamless integration with other speakers. This results in a perfectly balanced sound system with precise low-end reproduction. Additionally, the DSP system actively monitors the subwoofer's performance, protecting it from thermal or electrical overload to ensure reliable operation even during demanding gigs.

A Cardioid Subwoofer Built for Rigorous Use

Crafted with a robust wooden enclosure and a tour-grade painted finish, the KS212C is built to withstand the rigors of professional use. The heavy-duty construction ensures durability while maintaining acoustic integrity, even during frequent transport or high-output operation. Ergonomic aluminum handles and four low-noise casters make moving the 88-lb. enclosure a simple task, while dual M20 pole sockets enable flexible mounting options in both upright and horizontal orientations. This rugged design ensures the KS212C performs reliably in diverse environments, from live venues to permanent installations.

Precision Bass for Mobile and Installed Applications

The QSC KS212C cardioid subwoofer offers unparalleled low-end control in a portable format, making it an essential tool for mobile DJs, live sound engineers and venue operators. Its cardioid pattern keeps bass focused on the audience while minimizing unwanted stage interference, and its durable construction ensures it can handle the demands of professional use. Whether you need accurate low-frequency reinforcement for live performances or a permanent installation, the KS212C delivers exceptional results in a compact, transportable design.