QSC K12.2 Powered Loudspeaker (2000 Watts, 1x12")

QSC reinvents the lightweight powered PA speaker with the K12.2. DSP presets and custom settings give you full control over 2000 watts of room-filling sound.

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QSC K12 2-Way Powered Speaker (1000 Watts, 1x12")

No longer available at zZounds
Small but mighty, QSC's industry-leading K12 powered speakers push out 1000 watts RMS, covering the room in clear, defined sound, with switchable DEEP mode.

Build a no-compromises sound reinforcement system with QSC's small-yet-powerful K12 loudspeakers. Defying their compact size and weight, K12 speakers push out 131 dB peak SPL and 1,000 watts of continuous power, via a Class D bi-amped design. Since QSC's K-series speakers are self-powered, a pair of 41-pound K12s add up to a killer portable PA system for the pro mobile DJ or performer -- and thanks to their under-two-foot-tall size, QSC K12s are an excellent choice for houses of worship, formal banquet halls, or any installation where speakers need to fill a room with evenly-dispersed sound without disrupting the aesthetics of the space. There's even a switch to turn off the front-panel power LEDs, when a bright blue light doesn't match your venue. All told, K12 loudspeakers deliver the uncompromising build quality, professional looks, and consistent room coverage of QSC's high-end KW-series boxes -- all in a more compact and portable footprint.

Learn more with this video from QSC:

Typical Speaker Dispersion vs. the QSC K-Series

To understand how QSC's K family of PA speakers disperse sound so well, consider a basic acoustic principle: higher frequencies are more directional than lower frequencies. Woofer cones naturally disperse bass frequencies over a wider area, with narrower coverage as frequency increases up to the system's crossover point, where the tweeter takes over. This means that critical midrange frequencies -- where speech, vocals, and instrumental solos read more "live and die" within a mix -- can end up at a typical 2-way system's point of narrowest dispersion, compromising the midrange to anyone listening from more than 25-30 degrees to one side of the speaker's center. To counter this, the K12 employs Directivity Matched Transition (DMT), matching the high-frequency coverage angle of the tweeter to the natural coverage angle of the woofer at the crossover frequency. In plain English, DMT means that these speakers deliver even coverage of all frequencies throughout the speaker's 75-degree pattern. In effect, DMT gives you a two-way speaker that delivers the kind of consistent midrange you might expect from a much bulkier 3-way box.

Conical Tweeter + Intrinsic Correction = Better Coverage

It's easy to see just from looking at the face of the K12 speaker that QSC takes consistent audience coverage seriously. While typical tweeter horns are much wider than they are tall, the K12's tweeter waveguide has a conical, symmetrical mouth approximately the same diameter as the speaker's woofer, so it can control the pattern all the way down to the crossover frequency. It all adds up to a consistent frequency response in the critical midrange. Furthermore, the K12 is designed with Intrinsic Correction, a process developed for QSC's high-end line array systems. QSC engineers took extensive measurements of the K12's characteristics across a wide spatial field, averaged these measurements, and applied a series of filters to the speaker's built-in DSP engine to adjust time, frequency and amplitude response. The result is a speaker that distributes highs, mids, and lows evenly across the speaker's entire 75-degree pattern, with flat power response, eliminating "hot spots" in your audience.

Multiple Input Jacks: XLR, 1/4", and RCA

Just take a look at the QSC K12's back panel to see how versatile this speaker can be. Dual combination XLR-1/4" jacks accept line-level or microphone-level signals controlled by individual gain knobs, while a stereo pair of RCA inputs allow you to connect a CD player, MP3 player, or any device with RCA outs. In fact, you can connect up to three sources directly to the K12, mixing and summing them within the speaker. You'll find individual line-out jacks for channels A and B, ideal for daisy-chaining a pair of K12 boxes as stage monitors or in a cluster. Plus, there's a post-gain mono-summed line out that's ideal for connecting to an external subwoofer such as QSC's KSub. Last but not least, QSC has included their ingenious locking power cable with the K12. The V-LOCK power cord latches with a click, preventing these powered speakers from being unintentionally unplugged -- and just in case your K12's cables go missing, standard IEC power cables fit equally well.

Tilt-Direct Mounting System for Precise Aiming

You'd expect any pro PA speaker to have a pole-mounting cup, but the K12 takes things a step further with QSC's Tilt-Direct pole-mount socket. When mounting your K12 on a high wall mount or speaker stand, this ingenious socket lets you safely angle the speakers down at a 7.5-degree angle, so you can focus acoustic energy on the audience -- and away from walls, ceilings, or the front of the balcony. It's part of what makes the K12 great for portable PAs that need to work in a variety of venues. Furthermore, the K12's trapezoidal enclosure has one cleverly angled side, so it works equally well as a stage monitor wedge. Plus, the K12's integrated M10 suspension points allow for suspended installations with QSC's K-Series accessories.

Onboard EQ and Limiting: DEEP Mode + Vocal Boost

Underneath its unassuming rugged ABS enclosure, the QSC K12 is one of the smartest loudspeakers around, packed with high-tech signal processing to get the most out of its 1,000 watts. If you're working without a subwoofer -- and you may not need one, considering the K12s reach down to a thundering 48 Hz -- simply set a switch on the back of the speaker to activate DEEP mode: Digital Extension and Excursion Processing. This sophisticated peak limiter detects and corrects any brief bass transients that could cause clipping distortion and over-excursion of the K12's woofer -- and it increases the average output of low frequencies, helping your K12s to rock the house. Plugging in an external sub for that DJ set? Flip your K12s' back-panel switches to External Sub to engage a 100 Hz high-pass filter, and put your 1,000 watts to good use pumping out those crisp highs and mids. For speech applications or strict vocal reinforcement, simply turn off DEEP mode and engage the Vocal Boost switch for added presence in the critical midrange.

Check out our overview of the QSC K12 2-Way Powered Speaker:


- Two-way powered speaker with 12-inch woofer
- 75-degree vertical and horizontal coverage angle
- 1000-watt continuous Class D power amplifier, via a 2 x 500-watt bi-amped system
- Combination XLR-1/4" mic/line inputs, RCA inputs, discrete line outputs, plus summed outputs for daisy-chaining
- V-LOCK locking IEC power cord prevents unintentional unplugging
- Portable design with comfortable ergonomic handles
- Rugged ABS enclosures with one angled corner for floor monitor applications
- 35 mm pole sockets with Tilt-Direct for safe, precise aiming
- Sophisticated DSP, including DEEP mode for enhanced bass output and Vocal Boost for speech-specific applications

Your PA speakers are the link between the performance and the audience. With industry-leading consistent coverage over the entire listening area, K12 speakers are an excellent choice for mid-sized venues that require uncompromising sound. Whether you're outfitting a mobile PA system, or building a sound reinforcement installation, the QSC K12 speakers deliver unbeatable performance in a low-profile package.
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- Configuration: Multipurpose 2-way
- Transducers: 12 in. cone transducer, 1.75" HF driver
- Frequency Response (-6 dB): 52 Hz - 18 kHz
- Frequency Range (-10 dB): 48 Hz - 20 kHz
- Nominal Coverage (-6 dB): 75 degree conical
- Maximum SPL (1 meter): 131 dB peak

- Power Output: 1000 W Class D
- Input Impedance (ohms): XLR / 1/4": 40k balanced / 20k unbalanced XLR / 1/4" MIC mode: 2260 balanced
- RCA: 10k
- Controls: Power, Gain A, Gain B, Mic/Line, LF Mode (Ext Sub/Norm/DEEP), HF Mode (Flat/Vocal Boost), Front LED (On/Off/Limit)
- Indicators: Power, Signal A, Signal B, Standby, Limit, Mic
- Connectors: Balanced female XLR/1/4" line/mic level input, Balanced female XLR/1/4" line level input, Dual Balanced male XLR full range line level out, Balanced male XLR "mix" out, Stereo RCA line level input, Remote gain control, Locking IEC power connector
- Cooling: On demand, 50 mm variable speed fan
- Amplifier Protection: Thermal limiting, output overcurrent, overtemperature muting, GuardRail
- Transducer Protection: Thermal limiting, excursion limiting
- AC Power Input: Universal power supply 85 - 265 VAC, 50 - 60 Hz
- AC Power Consumption (1/8 Power): 100 VAC, 2.3 A
120 VAC, 2.01 A
230 VAC, 1.13 A

Pole Socket Size: 1-3/8" (35 mm)

- Material: Impact resistant ABS
- Finish: Black paint
- Grille: Black powder coated 18 gauge steel
- Dimensions (HWD): 23.7" x 14" x 14"
- Weight (Net): 41 lb / 18.6 kg

For support or warranty questions, please contact the manufacturer:
Phone: 800-772-2834
Web: http://qsc.com/support

QSC K12 2-Way Active Loudspeaker

The QSC K12 is quite simply the standard in lightweight powered loudspeaker systems. Under the direction of Pat Quilter, QSC's team of amplifier engineers have created upgraded Class D power modules unparalleled in the industry. Next, breaking from the traditional loudspeaker paradigm, every model is fitted with the identical 1.75-inch HF device (full-range models) and woofers of the same high quality for unparalleled performance, regardless of speaker size.

Extensive DSP processing is employed throughout the QSC K12, providing levels of sonic clarity and total output that defy the system's size and weight.

Premium-grade materials, advanced construction processes and multiple mounting and suspension options give the QSC K12 a wide range of live and installed applications.


Combo XLR and 1/4-inch TRS inputs accept both Mic and Line Level input while a set of RCA phono inputs allow additional connectivity to portable MP3 players, CD players and line-level mixers. Up to three audio sources can be mixed internally and summed to a balanced output for "daisy-chaining" of multiple units. Separate direct outputs are also provided on each channel for additional output flexibility.


On-board switches provide preset EQ settings. The HF setting can be set to Vocal Boost for additional presence in the critical mid-frequency area or Flat for accurate reproduction of the incoming signal. The LF switch can be set to NORM, DEEP(tm) for additional bass extension, or Ext Sub for use with an external subwoofer. The rear panel LED switch can be set to Power, illuminating the front-mounted LED when the unit is powered on, OFF for applications where it is not desirable to illuminate the front LED, or Limit which indicates to the system operator that the clip limiter circuit has been engaged during operation.

Built to Last

The QSC K12 is housed in a rugged ABS enclosure with a professional appearance that is at home in any application. ABS is a far more robust material than conventional speaker plastics and offers an additional measure of sonic clarity due to its internal rigidity. Ergonomic aluminum handles and a highly protective steel grille complete the package for ease of transport and long term durability.

Versatile Mounting Options

The QSC K12 features a unique Tilt-Direct(tm) pole cup mounting system. A simple turn of the dial engages a 7.5 degree downward tilt of the speaker allowing acoustic energy to be kept on the audience and off reflective surfaces for applications where maximum coverage from a high-positioned speaker is desired. Integrated M10 suspension points allow for suspended applications with a K Series M10 Kit (sold separately) or yoke bracket (sold separately).

Remote gain control capability is offered via a potentiometer (not included) connected to the on-board Euroblock connector. In an installed application, multiple K Series speakers can be "daisy-chained" for total gain control from a single remote pot. Auto-standby mode is engaged after 5 minutes of inactivity.

The QSC K12 features a unique Tilt-Direct pole cup mounting system. A simple turn of the dial engages a 7.5 degree downward tilt of the speaker allowing acoustic energy to be kept on the audience and off reflective surfaces for applications where maximum coverage from a high-positioned speaker is desired.


- Lightweight portable powered speakers with legendary QSC amplifier power and reliability
- 1000 watt Class D power module
- Extensive DSP enhances system performance
- Attractive and professional appearance
- Rugged ABS enclosures
- Tour-grade 18 gauge steel grilles
- Ergonomic handles with comfortable, non-slip grip
- 35 mm pole sockets with Tilt-Direct
- K12 performs as a main PA or stage monitor

Extensive DSP

DMT (Directivity Matched Transition) provides for matched LF and HF coverage across the entire listening area, eliminating unnatural dead or hot frequency zones

Intrinsic Correction, first featured in the high-end line-array products maps 65-75 spacially-averaged measurements to IIR and FIR filters that actively adjust time, frequency and amplitude response to a maximally flat bandpass target. The result is a speaker that behaves equally well across the entire sound field

DEEP and excursion limiting allow for extended low-frequency response by actively managing low-frequency transients without degradation of the underlying signal or adjacent frequencies

GuardRail protection, first introduced on the GX Series amplifiers protects both the amplifier module and your performance from unnatural and destructive clipping

Reviewers gave this product an overall rating of 5 out of 5 stars. (79 ratings)
Submitted April 16, 2010 by a customer from gmail.com

"These speakers are absolutely amazing. I purchased them thinking I would return them in 30 days, but I'm keeping them. My clie"

Overall: 5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
Absolutely amazing.
Light and powerful.
Ease of Use
Many input choices.
I could use these as jack stands.
Don't go cheap, these are well worth it.
Manufacturer Support
The company actually called me back regarding a technical question.

Musical Background:

Mobile DJ

Musical Style:

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No longer available at zZounds