QSC KLA181 Powered Subwoofer

The KLA181 powered subwoofer from QSC is designed to be used in the KLA series fixed line array system. It can reproduce frequencies down to 33Hz and produces up to 1,000 watts of output. This sub features a polarity switch, DEEP™ DSP algorithm, GuardRail™, Auto Standby, balanced line-level XLR input with an XLR “Thru” connector, Attenuation Control, and LED indicators.

The KLA181 has an integrated threaded pole-cup receptacle that allows you to pole-mount up to 2 KLA12 speakers on top of it for array setup (speakers sold separately). Its M10 fittings allow it to alternatively be suspension mounted.

More about QSC’s KLA Series

Experience the power and sophistication of line array speakers—in a system that’s easy to use. QSC’s KLA Series redefines line array systems with its simple Lift, Click and Play approach, allowing you to deploy it efficiently and effectively.  This fixed arcuate, active line array system is ideal for myriad portable and permanent sound setups, including live entertainment, houses of worship, and more.

The KLA Series is comprised of two models:

• KLA12 – A 12-inch, 2-way loudspeaker
• KLA181 – An 18-inch subwoofer

Both models boast a highly efficient power amp module: A 500W x 500W module in the KLA12, and a 1000W module in the KLA181. GuardRail™ circuitry protection prevents the amp module from unnatural and destructive clipping. 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.

KLA loudspeakers boast DEEP™ DSP algorithm, which actively manages potentially damaging low-frequency transients to extend the bass response of your system’s audio.

KLA’s Auto Standby mode automatically engages after 5 minutes of inactivity to reduce energy consumption; but upon resumption of the audio signal, the power module on the KLA will awaken instantly for immediate output.

Up to five KLA models of any combination can be driven off a single 15 amp/120V (8A/230V) electrical circuit. For permanent installations, multiple loudspeakers can be daisy-chained for total gain control from a single remote pot wired to the onboard Phoenix-style connector.

KLA loudspeakers can be either ground deployed or flown. For ground stacking, up to two KLA12 enclosures can be mounted over the KLA181 (or the KW181 subwoofer, sold separately, is compatible via a threaded pole socket *). Loudspeakers may be stacked without a sub using an appropriately rated loudspeaker stand (sold separately).

KLA12 enclosures feature the Tilt-Direct™ 35mm pole socket, allowing the speaker to be angled for optimal audience coverage. KLA enclosures are engineered for a 10:1 design factor. Use a KLA AF12 Array Frame or the M10 Integrated Suspension points to suspend one KLA Array consisting of one of the following three array configuration options.

Note: The maximum number of KLA12s in any array configuration (with or without KLA181s) is five.

QSC KLA181 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-cup 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)

• KLA181 Powered Subwoofer1

• Configuration18-inch subwoofer
• Transducers
  • High Frequency: NA
  • Low Frequency: 18-inch cone transducer
• Frequency Response (-6 dB)38 Hz
• Frequency Range (-10 dB)33 Hz
• 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 textured paint
  • Grille: Black powder coated 16 gauge steel
  • Dimensions (H x W x D): 30 x 28 x 24 inches (760 x 710 x 610 mm)
  • Net Weight: 104 lbs (47.2 kg)
  • Shipping Weight: 119.9 lbs (54.4 kg)