Product Description:


Add the KW181 active subwoofer to your PA rig and prepare to be amazed! This sub is made to make you sound great, anywhere you use it. Hire a pair of QSC speakers for that amazing sound! Only want one QSC speaker? No problem, just click here. If it's power you're after, then this is your sub. QSC built the KW181 to give you big-time performance, to the tune of 1,000 watts. And, thanks to the Class D design, this speaker won't break your back when it's time to set up or tear down! There is super easy access to XLR and TRS connection options on the KW181's rear panel.




Hire comes with speaker stands packed away in a sturdy carry bag. 18” subwoofer, can be used alone or in pairs 1000 watt Class D continuous power Tour-grade 16 gauge steel grilles Rugged, sturdy birch encasing.




  • Configuration: 18-inch subwoofer
  • Transducer: 18-inch cone transducer Frequency Response (-6 dB) 40 Hz to 112 Hz
  • Frequency Range (-10 dB) 37 Hz to 129 Hz Maximum SPL1 135 dB peak
  • Amplifiers Power Output2: 1000 W Class D continuous 2000 W peak Input
  • Impedance: XLR / 38 k balanced / 19 k unbalanced
  • Controls: Power, Gain, LF Mode (Normal/DEEP), Polarity (Normal/Reverse), Front LED (On/Off/Limit)
  • Connectors: Dual balanced female XLR/¼" line-level input, Dual Balanced male XLR full range line level out, Remote gain control, Locking IEC power connector
  • 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: 15 mm painted birch plywood
  • Finish: Black textured paint
  • Grille: Rugged Powder-Coated Steel Grille
  • Dimensions (HWD) inches: 20.1 x 23.4 x 29.9 with casters
  • Dimensions (HWD) mm: 510 × 595 × 761 with casters
  • Net Weight: 83 lb / 37.6 kg