QSC KW181 Subwoofer



1 x IEC Power Cable

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QSC KW181 Subwoofer

The QSC KW181 is a super-powerful yet surprisingly compact 18-inch powered subwoofer. Boasting a huge 135dB peak SPL with 2000w peak power, the QSC KW181 will provide excellent bass response even in large venues and extensive onboard DSP featuring DEEP and Intrinsic Correction further enhances total system performance. The 15mm birch ply enclosure and rugged 16 gauge steel grilles provide ample protection.

The QSC KW181 speaker features a QSC designed, 1000W (2 x 500) Class D power module. The loudspeaker is also fitted with an 18″ cone transducer of the same high-quality design. The QSC KW181 speaker has an LF switch which can be set to NORM, DEEP for additional bass extension. The rear panel LED switch can be set to POWER, illuminating the front-mounted LED when the QSC speaker is powered on, OFF for applications where it is not desirable to illuminate the front LED or LIMIT which indicates to the system operator that the clip limiter circuit has been engaged during operation.

The QSC KW181 subwoofer, like all its KW Series brethren, is designed to withstand the rigors of professional use. Advanced construction processes, premium-grade Baltic birch cabinetry, ergonomic, cast aluminum handles, low-noise casters, and a highly protective steel grille provide for ease of transport and long-term durability. The QSC loudspeaker’s integrated M10 suspension points allow for flown applications and a threaded pole receptacle provides for a positive, wobble-free connection to a threaded speaker pole.


  • 18” subwoofer
  • Threaded pole socket
  • Maximum SPL 135 dB peak
  • Comfortable ergonomic handles
  • Tour-grade 16 gauge steel grilles
  • 1000 watt Class D continuous power
  • Rugged, texture-painted birch enclosures
  • Speaker mounting pole included (35 mm diameter, 36 inches (91 cm) long, M20 thread.)

Additional information

Weight 40 kg
Dimensions 76 × 59 × 51 cm