QSC KLA181 18-inch Active Flying Subwoofer Black Color

1,000 watt power module, high acoustic 135 dB SPL peak output, powerCON® input and thru connections

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What's in the box:

  • QSC KLA181 (Black)
  • Quick-Start Guide
  • Warning Information Sheet
  • AC PowerCon Power Cord (CEE 7/7), 3.6 Meter
  • AC PowerCon Power Cord (NEMA 5-15 - USA style), 12 Foot
  • XLR Audio Loop-thru Cable, 3 Foot
  • PowerCon Loop-thru Power Cord, 3 Foot
  • Hex Key, 6mm
  • Three-Year Warranty


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The 1000 Watt KLA181 Subwoofer Adds Defined Low End to Your QSC KLA Array System

The QSC KLA181 Active Subwoofer is the perfect partner for the KLA12 12" 2-way speaker to create a KLA line array system. The KLA181 offers an 18" LF driver in a compact wood cabinet powered by a highly efficient, 1,000 watt power amp module for powerful and accurate low end. QSC's efficient amp design enables up to five KLA models (any combination of KLA12 and KLA181) to be driven off of a single 15 amp, 120 volt electrical circuit.

KLA loudspeakers incorporate QSC's DEEP™ DSP algorithm - providing extended bass response by actively managing potentially damaging low-frequency transients. 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 addition, the QSC KLA181 has a polarity switch for low frequency directivity control.


  • 1,000 watt power module
  • 18" ported subwoofer
  • High acoustic output (135 dB SPL peak)
  • Frequency range down to 33 Hz (-10 dB)
  • Extensive DSP further enhances and protects performance
  • powerCON Input and Thru connections
  • Threaded pole-cup receptacle for free-standing applications
  • Suspension made possible via M10 fittings or KLA12AF Array Frame
  • Integrated threaded pole mount supports up to two KLA12 enclosures

Be sure to check out the brochure and video for more information!

Specifications for the QSC KLA181 18-inch Active Flying Subwoofer

{ "Configuration" : "18-inch subwoofer", "Transducers, High Frequency, Low Frequency" : "18-inch cone transducer", "Frequency Response (-6 dB)" : "38 Hz", "Frequency Range (-10 dB)" : "33 Hz", "Nominal Coverage" : "-", "Maximum SPL (1 meter)" : "135 dB peak", "Amplifiers
Power Output" : "1000 W Class D continuous", "Input Impedance" : { "XLR" : [ "40 kΩ balanced", "20 kΩ unbalanced" ] }, "Controls" : [ "Power", "Attenuation", "LF Mode (Normal/DEEP™)", "Polarity (Normal/Reverse)", "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 to 60 Hz", "AC Power Consumption (1/8 Power)" : [ "100 VAC, 2.3 A", "120 VAC, 2.01 A", "230 VAC, 1.13 A" ], "Enclosure" : { "Material" : "Painted birch plywood", "Finish" : "Black or white textured paint", "Grille" : "Black or white powder coated 16 gauge steel", "Dimensions (HWD) inches" : "21.6 x 23.1 x 25.7", "Dimensions (HWD) mm" : "547 x 586 x 633", "Net Weight" : "100 lb / 45.3 kg" } }

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