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The KLA12 is part of the QSC KLA Line Array series. These arcuate, powered loudspeakers are known for generating sophisticated sound with relentless power in a user friendly line array system. Load in and be ready for sound check in no time with the unique Lift, Click, and Play design—the KLA12 may be either ground stacked or flown. This fixed system can be deployed as part of a portable touring sound system, or installed permanently in arenas, theaters, or places of worship and congregation. Pair the KLA12 and KLA181 in any combination of 5 with a daisy-chain XLR configuration for complete gain control from one remote pot.

Sound engineers will enjoy premium power efficiency and can run any combination of 5 KLA models on one 15 amp/120V electrical circuit. QSC has integrated an Auto Standby feature to put the speakers in standby mode after five minutes of output inactivity. When signal returns, the 500 x 500 Watt power amp module will re-engage and is capable of instant output. Power is delivered by powerCON in/thru connectors and the loudspeakers are housed in a durable ABS box that’s both rugged and light weight, resulting in hassle free operation and minimal maintenance.

QSC KLA12 Features

  • 500W x 500W continuous power rating
  • 12" cone transducer and 1-3/4" diaphragm compression driver
  • Balanced female XLR line input
  • Impact-resistant ABS enclosure
  • 44Hz - 20kHz frequency range


  • Configuration: multipurpose 2-way
  • Transducers:
    • HF: 1.75" diaphragm compression diver
    • LF: 12" cone transducer
  • Frequency Response (-6 dB): 49Hz-18kHz
  • Frequency Range (-10 dB): 44Hz-20kHz
  • Nominal Coverage: 90°H x 18°V
  • Maximum SPL (1 meter): 131 dB peak
  • Amplifier:
    • Power Output:
      • HF: 500W Class D continuous
      • LF: 500W Class D continuous
    • Input Impedance (ohms): XLR: 40k balanced/20k unbalanced
    • Controls: Power, Attenuation, LF Setting (External Sub/Normal/Deep™), Array Size (1-5), Front LED (Pwr/Limit/Off)
    • Indicators: Power, Signal, Standby, Limit
    • Connectors: Balanced 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
    • 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 100 - 240 VAC, 50 - 60 Hz
    • AC Power Consumption (1/8 Power):
    • 100 VAC, 2.3 A
    • 120 VAC, 2.01A
    • 230 VAC, 1.13 A
  • Enclosure:
    • Material: Impact-resistant ABS
    • Grille: Powder coated 18 gauge steel
    • Dimensions (HxWxD): 15" x 23.4" x 16.6" (382 x 594 x 422 mm)
    • Net Weight: 55 lbs (25 kg)
    • Color: Black