QSC KS212C Powered Subwoofer 3,600W Dual 12 Inch Cardioid Directional

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UPC: 684284066763
Sale price$2,099.99 Regular price$3,040.79
In stock (23 units), ready to be shipped

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The QSC KS112 subwoofer is a great match for the K10 or K12 series speakers and will bring the thunder. What makes this sub different is the directional ability of the cabinet. It will direct bass onto your dance floor and to your audience, bring the boom where you want it, efficiently.


Our customers here at the shop rave about this compact high output subwoofer. It's an ultra-compact active subwoofer suited for portable PA rigs, entertainment, DJ's, houses of worship and clubs. It's equally at home with permanent installation applications. 


This sub is a serious performer in a small package, is highly portable, and hosts a single 12-inch bandpass design subwoofer, powered by a 2000 Watt peak power Class D amplifier module. The cabinet is constructed of premium birch and includes high-quality, low noise casters. No fiberboard or recycled crap, this cabinet is made the right way. 

Two high quality M20 threaded pole receptacles are available for a positive, wobble-free connection to a threaded speaker pole in either vertical or horizontal deployment (pole not included).

This speaker system is Powered by a 3,600 Watt Class D amplifier with the latest DSP technology, and featuring dual 12-inch long excursion drivers each arranged in a 6th order band pass chamber, these components all combine seamlessly to produce a staggering 15 dB more output at the front of the cabinet than at the rear. Highly portable, the cabinet features comfortable, aluminum handles and four, rear-mounted casters. Two M20 sockets accept a 35 mm loudspeaker pole in either horizontal or vertical orientation.


KS212C Cardioid Subwoofer Review from Sounds Tech (read the pdf here)

⭐⭐⭐⭐⭐(5 Star Review)

"Incredible power and clarity for such a small sub. We use 2 of these subs in small settings up to 350 people with a live band and totally love them.

Previously to these, we were using the QSC Ksubs which we had for 6 years, and the new Cardioid Subs out do their predecessors in every way.

The biggest benefit is obviously the increased power and quality of sound, but my favourite thing so far has been the on stage sound is so much clearer due to the cardioid design. In the shop I couldn't hear much of a difference but as soon as you have them working you really notice it.

Incredible job by QSC. They also handle a live kick drum very nicely. Super fat and punchy. If I was asked to be super critical, the only thing negative I could come up with is the wheels are not that hard wearing.

A couple of mine are all chipped up and rough already and I've only had them a few months. We are very careful with out equipment too so wouldn't want to see them take abuse. All in all, they are by far the best sounding small sub on the market to my ear. Go get some..."

-Christoph (Scotland) Gigged all over the world, and played live music professionally for over 22 years using all sorts of audio systems from small venues to stadiums.

⭐⭐⭐⭐⭐(5 Star Review)

"I was skeptical at first about utilizing a 2-12 sub cabinet for my three piece Classic Rock band but needed to simplify and lighten the load on my sound rig.

Knowing how great QSC products are I wasn't too worried and was definitely impressed with the output from a single KS212C Sub.

The low end was more than enough for the kick drum and my bass, even at a medium sized outdoor venue. The bonus of this sub is something that I didn't realize we needed.

The cardoid pattern allowed us to clearly hear ourselves on stage and improved our ability to hear the monitor mix. It was much easier to keep a reasonable stage volume and be able to hear our instruments and vocals. Thank you QSC!"

-Christoph (Scotland) from Cleveland, Ohio
Audio Experience: Bass Player, Vocalist, Sound Engineer

Cardioid Subwoofer - Directional, Portable and Efficient Design

The QSC KS212C subwoofer is a powerful and versatile option that delivers deep, rich bass tones with exceptional clarity and accuracy. It is designed specifically for use in professional sound reinforcement systems, and can withstand heavy use and high volume levels.

The KS212C is driven by a 3600-watt, Class-D amplifier, which provides ample power to the 12-inch subwoofer cone, making it perfect for large venues and events. The cone is made of high-density polypropylene which ensures both lightweight and durability. It also features a high-quality foam surround that reduces distortion and improves overall sound quality.

The built-in crossover allows you to adjust the crossover point and phase, ensuring that the subwoofer seamlessly integrates with the rest of your sound system. The subwoofer also includes various input and output options, such as XLR, TRS, and RCA connectors, as well as a switchable high-pass filter for removing low frequencies from main speakers.

The KS212C is built to last, with its cabinet constructed from durable, high-impact birch plywood, coated in a black textured paint finish that is resistant to scratches and scuffs. The control panel makes it easy to adjust the volume, crossover point, and phase, making sure your sound system is always in balance and tuned.

Overall, the QSC KS212C subwoofer is an ideal choice for professional sound reinforcement systems as it offers a powerful and versatile subwoofer that delivers deep, rich bass tones with exceptional clarity and accuracy. With its 3600-watt, Class-D amplifier and 12-inch subwoofer cone, it can handle high volume levels and is built to withstand heavy use.

  • Professional powered subwoofer for For Bands, Bars, Clubs, Houses of Worship, Mobile Entertainers
  • High Output in an ultra-compact form factor
  • 2000 Watt Class D amplifier module
  • 12-inch, long-excursion driver; 6th order bandpass design
  • Intrinsic Correction™tuning and loudspeaker management
  • 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 dual M20 speaker pole fittings
  • Optional KS-LOC security cover prevents unauthorized tampering of controls
  • Complete EASE & CAD information available online
  • 6-Year Warranty*


Configuration 6th-Order Bandpass Subwoofer
LF Transducer 305 mm (12 in), Cone
Frequency Response (-6 dB) 41 Hz - 108 Hz
Frequency Range (-10 dB) 38 Hz - 121 Hz
Maximum Rated SPL1 128 dB @ 1 m (peak)
Amplifier Class D
2000W (peak)
Cooling Low-noise, variable speed fan
Controls Power On/Off
Gain Control
Rotary encoder
2 × selection buttons
Indicators 2 × Power LED (front and rear)
Input Signal LED
Limiter Active LED
Connectors 2 × locking XLR/F 1/4-inch combo
2 × XLR/M (Loop-thru Output)
1 × locking IEC power connector
AC Power Input Universal power supply 100 - 240 VAC, 50 - 60 Hz
AC Power Consumption 100 VAC, 2.4 A / 120 VAC, 2.0 A / 240 VAC, 1.3 A
Enclosure Details
Enclosure 15 mm Birch Plywood
Color Black (RAL 9011)
Grille Internal woofer cover
Speaker Dimensions (H×W×D) 622 × 394 × 616 mm
24.5 × 15.5 × 24.25 in
Carton Dimensions (H×W×D) 740 × 500 × 673 mm
29 × 19.7 × 26.5 in
Net Weight 28.4 kg / 62.6 lb
Shipping Weight 35 kg / 77.2 lb
Regulatory CE, WEEE, UL, China RoHS, RoHS II, FCC Class B
Included Accessories 4 × Low-Noise, Heavy Duty Casters
Optional Accessories

KS112 CVR Transport Cover, KS-LOC Lock-Out Cover
SP-26 and SP-36 Loudspeaker Poles, SP-16X Extension Pole


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