QSC KLA12 12inch 2-Way Active Line Array Loudspeaker

  • High power, 12” low frequency driver
  • 500 W + 500 W power module
  • Rugged, ABS enclosure delivers light-weight durability
  • SOLO™ Rigging System
  • Extensive DSP further enhances and protects performance

$2,289.00 CAD

In stock

SKU: 684284058041 Category: Tags: , , Model Number: KLA12-B


About QSC KLA12 12inch 2-Way Active Line Array Loudspeaker

The KLA Series brings the power and sophistication of a line array system into an easy-to-use product significantly redefining the line array product category. With its simple Lift, Click and Play approach, KLA can be deployed in a fraction of the time required by comparable line array products. This fixed arcuate, active line array system is ideal for a wide range of portable and permanently installed applications ranging from live entertainment to houses of worship or other venues where a line array system is desired.

KLA Power Module

The KLA Series is comprised of two models: the QSC KLA12 12inch 2-way active line array loudspeaker and the KLA181 18-inch subwoofer. The KLA12 features a highly efficient 500 W x 500 W power amp module and the KLA181 offers the same highly efficient power amp module in a 1000 W configuration. This efficient design enables up to five KLA models (any combination of QSC KLA12 12inch 2-way active line array loudspeaker and KLA181) to be driven off of a single 15 amp/120V (8A / 230V) electrical circuit. KLA loudspeakers incorporate QSC’s DEEP™ DSP algorithm, providing extended bass response by actively managing potentially damaging low-frequency transients, and GuardRail™ circuitry protection which prevents the amplifier module from unnatural and destructive clipping. As an energy saving feature, the Auto Standby mode automatically engages after five minutes of inactivity but upon resumption of audio signal, the power module on the KLA will awaken instantly for immediate output.

In an installed application, multiple KLA Series loudspeakers can be “daisy-chained” for total gain control from a single remote pot wired to the on-board Phoenix-style connector. Additional power module characteristics on KLA include a balanced, line-level XLR input in parallel with an XLR “Thru” connector, powerCON® In and Thru connectors, Attenuation Control and LED indicators for Signal and Limit, as well as discrete LED indicators for Power/Standby status.


Housed in a rugged ABS enclosure that results in both light weight and long-term durability, the QSC KLA12 12inch 2-way active line array loudspeaker features a 12-inch low-frequency transducer coupled with a 1.75-inch compression driver housed on a multiple difraction aperture waveguide. This waveguide design is based upon similar principles found on our patented WideLine™ Series waveguides and the waveguides found on our K Series products. Designed to be used exclusively as a fixed arcuate line array, each KLA12 is configured for a 90˚ x 18˚ coverage angle, allowing 90˚ vertical arrays to be configured using only five boxes (most other solutions require six). KLA’s unique self-contained SOLO™ (Single-Operator Logistics) Rigging System enables users to quickly assemble (and disassemble) the line array in a fraction of the time without the need for special tools or external hardware. KLA12’s Ar-Q™ (Arcuate Equalization) processing enables users to quickly tune and configure the array, making appropriate frequency adjustments based on the number of boxes. With the click of a dial, the user can select the total number of boxes deployed in the array resulting in an evenly balanced and accurate tonal curve. QSC’s proprietary Intrinsic Correction™ actively adjusts time, frequency and amplitude response to achieve a maximally flat bandpass target.


QSC KLA12 12inch 2-Way Active Line Array Loudspeaker Features:

  • 500 W + 500 W power module
  • Rugged, ABS enclosure delivers light-weight durability
  • SOLO™ Rigging System supports deployment without tools or external hardware
  • Ar-Q™ Frequency Optimization quickly tunes the array with the click of a dial, adjusting for the appropriate number of boxes
  • 10:1 design factor supports arrays of up to 480 lbs. (218 kg) 5 × KLA12 and 2 × KLA181
  • 90° × 18° nominal coverage (requires only five boxes to configure a 90° x 90° array)
  • High power, 12” low frequency driver provides extension down to 44Hz without subwoofers
  • Extensive DSP further enhances and protects performance
  • 1.75” diaphragm compression driver delivers clear and powerful high-frequency reproduction
  • powerCON® Input and Thru connections
  • Tilt-Direct™ pole mount assists directivity in single-unit applications


QSC KLA12 12inch 2-Way Active Line Array Loudspeaker Specifications:

ConfigurationMultipurpose 2-way
High Frequency
Low Frequency
1.75” diaphragm compression driver
12” cone transducer
Frequency Response (-6 dB)49 Hz – 18 kHz
Frequency Range (-10 dB)44 Hz – 20 kHz
Nominal Coverage90° H x 18° V
Maximum SPL (1 meter)131 dB peak
Power OutputHF: 500 W Class D continuous
LF: 500 W Class D continuous
Input ImpedanceXLR: 40 kΩ balanced / 20 kΩ unbalanced
ControlsPower, Attenuation, LF Setting (External Sub/Normal/DEEP™), Array Size (1-5), Front LED (Pwr/Limit/Off)
IndicatorsPower, Signal, Standby, Limit
ConnectorsBalanced female XLR line level input, Balanced male XLR full range line level out, Remote attenuation control, Locking powerCON power connector AC In, Locking powerCON® power connector AC Out
CoolingOn demand, 50 mm variable speed fan
Amplifier ProtectionThermal limiting, output overcurrent, overtemperature muting, GuardRail™
Transducer ProtectionThermal limiting, excursion limiting
AC Power InputUniversal power supply 100–240 VAC, 50 to 60 Hz
AC Power Consumption
(1/8 Power)
100 VAC, 2.3 A
120 VAC, 2.01 A
230 VAC, 1.13 A
MaterialImpact resistant ABS
FinishBlack or white paint
GrilleRugged powder coated steel grille
Dimensions (HWD) inches15.0 × 23.4 × 16.6
Dimensions (HWD) mm382 x 594 x 422
Net Weight55 lb / 25 kg

Additional information

Weight69.5 lbs
Dimensions26.0 x 21.0 x 18.0 in


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