QSC KLA181-WH 18" Active Flying Subwoofer in White

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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. The KLA Series is comprised of two models, the KLA12 12-inch, 2-way loudspeaker and the KLA181 18-inch subwoofer. The KLA12 features a highly efficient 500 watt by 500 watt power amp module and the KLA181 offers the same highly efficient power amp module in a 1,000 watt configuration. This efficient 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 - 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, Limit, Power and Standby status.

Please note: The KLA 181-WH / KLA 181 White model does not feature a threaded pole receptacle/Speaker pole mount. This option is only available on Black models.

QSC KLA181-WH 18" Active Subwoofer Features:

  • 1,000 watt power module.
  • 18" vented 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 receptacle for free-standing applications (black models only.)
  • Suspension made possible via M10 fittings or KLA12AF Array Frame.
  • Integrated threaded pole mount supports up to two KLA12 enclosures (black models only.)

QSC KLA181 Specifications
KLA Series 
Configuration18" subwoofer
  High Frequency
  Low Frequency 

18" cone transducer
Frequency Response (-6 dB)38 Hz
Frequency Range (-10 dB)33 Hz
Nominal Coverage-
Maximum SPL (1 meter)135 dB peak
Power Output1000 W Class D continuous
Input Impedance (ohms)XLR: 40k balanced / 20k unbalanced
ControlsPower, Attenuation, LF Mode (Normal/DEEP), Polarity (Normal/Reverse), 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 - 60 Hz
AC Power Consumption
(1/8 Power)
100 VAC, 2.3 A
120 VAC, 2.01 A
230 VAC, 1.13 A
MaterialPainted birch plywood
FinishBlack or White textured paint
GrilleBlack or White powder coated 16 gauge steel
Dimensions (HWD)21.6" x 23.1" x 25.7"
(547mm x 586mm x 633mm)
Weight (Net)100 lb (45.3 kg)
Available AccessoriesKW181 POLE (black models only)

Each KLA181-WH Retail Box Includes:
(1) Quick-Start Guide
(1) Warning Information Sheet
(1) KLA181 Subwoofer Assembly
(1) AC powerCON Power Cord (CEE 7/7), 3.6 Meter
(1) AC powerCON Power Cord (NEMA 5-15 - USA style), 12 Foot
(1) XLR Audio Loop-thru Cable, 3 Foot
(1) powerCON Loop-thru Power Cord, 3 Foot
(1) Hex Key, 6 mm
(1) Euro-style Connector Plug, 3-pin

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