KLA181 Black Active Subwoofer 18" 1000W Class D with DSP

« return to previous page
QSC KLA181 Black Active Subwoofer 18 1000W Class D with DSP - Main Image
QSC KLA181 Black Active Subwoofer 18 1000W Class D with DSP - Image 1
QSC KLA181 Black Active Subwoofer 18 1000W Class D with DSP - Image 2
QSC KLA181 Black Active Subwoofer 18 1000W Class D with DSP - Image 3
QSC KLA181 Black Active Subwoofer 18 1000W Class D with DSP - Image 4
RRP: £2,745.60 inc VAT
Manufacturer Code:
KLA181 Black
Stock availability:
Stock: Checking stock

Quantity required:

Main Features

  • Power and sophistication of a line array into an easy-to-use product
  • A high quality, easy to use Line Array Subwoofer
  • Features a simple Lift, Click and Play approach
  • Can be deployed in a fraction of the time required by comparable line array products
  • Rugged, ABS enclosure delivers light-weight durability
  • Extensive DSP further enhances and protects performance

KLA181 Active Subwoofer 18" 1000W Speaker

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 KLA181 offers a 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.

KLA181 Subwoofer

In addition to DEEP™ DSP algorithm, GuardRail™, Auto Standby, balanced line-level XLR input with an XLR "Thru" connector, Attenuation Control and LED indicators, the KLA181 subwoofer also includes a polarity switch to optimize summation between subwoofer and top-boxes.

Rigging & Deployment

For maximum deployment flexibility, KLA loudspeakers can be either ground deployed or flown. As a ground stack, up to two KLA12 enclosures can be mounted over the KLA181 or the KW181 subwoofer via a threaded pole socket, or without a sub using an appropriately rated loudspeaker stand. 

Arrays of up to 480 lbs (218 kg) (with a maximum five KLA12 and two KLA181 enclosures) can be flown via the included M10 fittings or the optional KLA AF12 array frame.

Product 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 
  • Suspension made possible via M10 fittings or KLA12AF Array Frame
  • Integrated threaded pole mount supports up to two KLA12 enclosures 

Product Specifications


  • Configuration:  18" subwoofer
  • Transducers:  Low Frequency:  18" cone transducer
  • Frequency Response (-6 dB):  38 Hz
  • Frequency Range (-10 dB):  33 Hz
  • Maximum SPL (1 meter):  135 dB peak


  • 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
  • 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


  • 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

Physical & Dimensions

  • Material:  Painted birch plywood
  • Finish:  Black 
  • Grille:   Black powder coated 16 gauge steel
  • Dimensions (HWD):  547 x 586 x 633mm
  • Net Weight:  45.3 kg

What’s in the Box?

  • Quick-Start Guide
  • Warning Information Sheet
  • KLA181 Subwoofer Assembly
  • 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, 6 mm
  • Euro-style Connector Plug, 3-pin

Product Video