QSC KW181 1000W 18" Powered Subwoofer (Discontinued)


92 out of 100. Incorporating 225+ ratings and reviews.

Street Price: 

QSC KW181 1000W 18" Powered Sub Woofer

Meta Analysis Overview

Our rating of 92/100 is based on analysis of 225+ sources comprised of online reviews and discussions. Under the Pros and Cons headings below you'll find a condensed analysis of what those owners and users have been saying. Feel free to ask questions or add your thoughts in the comments section.

QSC are one of the leading brands when it comes to powered PA speakers of all types and this includes their QSC KW18 powered subwoofer.

It comes with casters and a 36" mounting pole making it easy to position wherever you need it.

It's built tough with a birch plywood enclosure and 16 gauge steel grilles.


  • Frequency Response: 35 Hz to 129 Hz (-10dB)
  • Crossover: Not specified
  • Max SPL: 135 dB peak
  • Power Rating: 1000 W Class D continuous - 2000 W peak
  • Driver: 18" cone transducer
  • Input Connectors: 2 x balanced XLR/¼"
  • Output Connectors: 2 x balanced male XLR
  • Polarity: Normal/Reverse
  • Enclosure Material: 15 mm painted birch plywood
  • Dimensions: 20.1" x 23.4" x 29.9" with casters
  • Weight: 83 lb / 37.6 kg


Musicians, DJs and audio engineers all rate this powered sub very highly often saying that the power it produces is impressive. It also gets quite a few positive comments for the casters which make it easy to transport.


There were no real consistent complaints in customer reviews other than a few people saying they wished the price was a bit lower.


We were recommending the QSC KW181 from May 2016 until January 2018 and the reason it came of our recommended list was that there are now more highly rated options available which you will find in our guide to The Best PA Subwoofers - Powered & Passive.

Here is a good video overview from AGIPPRODJ: