Store & Service Updates - All stores closed for In-Store shopping but remain open for Click & Collect only - Find Out More

QSC KS212C Cardioid Active PA Subwoofer

QSC KS212C Cardioid Active PA Subwoofer



Order before 3pm Mon-Fri for Next Day Delivery

The QSC KS212C Cardioid Sub is equipped with the latest Class D Amplifier technology and a revolutionary approach to subwoofer cabinet design.

The result is a super-wide dispersion field that fills a room far more efficiently than traditional subwoofer designs!

Keep Bass In Its PlaceTraditionally, subwoofers emit sound in all directions which often results in troublesome low-frequency build-up. Whilst sound technicians have been able to redirect the disruptive sounds and patterns, it requires complex setups and can be very expensive. Therefore, the innovative K Cardioid Subwoofer is designed to eradicate the troublesome scenarios by 'keeping bass in its place'. Situated within one compact enclosure, the subwoofer reaps the benefits of a cardioid subwoofer array and is ideal for mobile entertainers, rental professionals or any medium sized venue where low frequency energy needs to be minimised.

The speaker is powered by a Class D amplifier and processed with the latest DSP technology. The QSC KS212C combines these with the 12" excursion drivers, arranged in a 6th order bandpass chamber, results in a stunning front-to-rear 15 dB attenuation. With aluminium handles and four, rear-mounted casters, the speaker is highly portable and offers two M20 sockets for connection with a 35 mm speaker pole whether the sub is used vertically or horizontally.

Extensive DSP Technology

The QSC K Cardioid KS212 Subwoofer features the latest DSP technology. Directivity Matched Transition provides matched LF and HF coverage across the entire listening area so there are no unnatural 'dead' or 'hot' frequency zones. Extended low-frequency response is provided by continually managing low-frequency transients without degrading underlying signals. Finally, the GuardRail protection protects the amp module from disruptive clipping.

Light & Rugged Construction

As a member of the QSC K family, the K Cardioid is housed with rugged, robust, and lightweight ABS material. The ABS enclosure delivers added clarity due to the rigid internal components and is far more robust than the conventional plastic surfaces.

QSC K Series

Representing a new standard in lightweight speaker systems, the K Series by QSC sets a new standard of quality within the Class D power modules. Each speaker within the system features extensive digital signal processing technology (DSP) to deliver sonic clarity and total output that surpass what is expected in regards to system size and weight. Each speaker in the K Series includes premium-grade materials constructed with multiple mounting and suspension options to offer versatility in their application.

QSC KS212C Cardioid Sub 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
  • Intrinsic Correction tuning and loudspeaker management
  • Refined, professional appearance looks
  • Rugged painted wood enclosure for long life and lasting durability
  • Deployment in either vertical or horizontal positions with M20 speaker pole fittings in either position
  • Optional KS-LOC security cover prevents unauthorized tampering of controls
  • Complete EASE & CAD information available online
  • 6-Year Warranty (Upon Registration)


More Information
Manufacturer QSC
SKU 164795
Shipping Weight (kg) 48.500000
Pole Mountable No


We know you want to get your gear as quickly and as safely as possible, Next Working Day Delivery to UK Mainland Addresses, on all IN STOCK items, if ordered before 3pm. This will include a text or email on the day of delivery giving you an exact hour window of when your gear will be with you.

  • Orders under £99: £4.99 Delivery Charge
  • Orders over £99: Free Next Day DPD Delivery (When Ordered before 3pm)
  • Weekend Delivery (Saturday-Sunday): £9.99 (When Ordered before 3pm Friday)
  • Heavy Items (over 40kg): £39.99 Pallet Service







Rather not wait in for the delivery? Don’t worry, we’ve got you…In Stock items can be ordered and paid for in-advance Online via our Click & Collect service. As long as if it's in stock at your chosen branch, you can collect the item within 2 hours*.



If you have bought something In-Store or Online and want to return it as unwanted, you have 30 days from when you receive the goods to contact our PMT experts either by phone or email to return your item.

We can offer you a refund if you return your item within 30 Days from purchase date and with 100% perfect packaging. 


Please Note - We cannot accept unwanted returns on microphones, any in-ear earphones or monitors, and any other items that touch your mouth, nose or inner ear if you have removed the hygienic packaging.