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QSC KW181 1000 Watt 18" Active Subwoofer

Pump up the volume and rattle them bones with QSC’s 1,000 watt, 18” Active Subwoofer!


(20 reviews)


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MSRP: Old Price $1,749.99 Discounted Price $1,299.99 Save : $450.00 (26%)
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MSRP: Old Price $1,749.99 Discounted Price $1,299.99 Save : $450.00 (26%)
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The QSC KW181 Subwoofer is a room shaker that will add some serious bottom end to any audio system but it’s engineered to perfectly complement QSC’s KW Series of active loudspeakers.

The KW181 boasts a 1,000 watt, Class-D power amplifier that drives a QSC 18" cone transducer to produce an SPL rating of 135 dB, only slightly lower in sound output than a jet on takeoff. And just as impressive is QSC’s proprietary “Intrinsic Correction” DSP, first featured in their high-end line array products with spatially averaged measurements to IIR and FIR filters that actively adjust time, frequency and amplitude response to a maximally flat bandpass target. The result is a speaker that behaves equally well across the entire sound field.

All KW Series features a four-position mic/line gain switch that allows for connection of a wide variety of devices, plus the KW181 also offers variable output level adjustment and polarity phase switch, along with combo XLR and 1/4" TRS inputs that accept both mic and line level inputs and dual balanced male XLR full range line level outputs. Other features include a threaded pole socket and a 3 foot, 33 mm diameter  speaker mounting pole.

Premium-grade materials
KW Series is designed to withstand the rigors of professional use. Advanced construction processes, premium-grade Baltic birch cabinetry, ergonomic, cast aluminum handles, low-noise casters (KW181) and a highly protective steel grille provide for ease of transport and long term durability. Integrated M10 suspension points allow for flown applications with a KW M10 KIT (sold separately) and a threaded pole receptacle (KW181) provides for a positive, wobble free connection to a threaded speaker pole (included).

  • 18” subwoofer
  • Maximum SPL 135 dB peak
  • 1000 watt Class D continuous power
  • Extensive DSP featuring DEEP and Intrinsic Correction enhances system performance
  • Rugged, texture-painted birch enclosure
  • Tour-grade 16 gauge steel grilles
  • Threaded pole socket
  • Speaker mounting pole included (36" w/M20 thread)
  • Comfortable ergonomic handles

Get your QSC KW181 1000 Watt 18" Active Subwoofer today at the guaranteed lowest price from Sam Ash Direct with our 45-day return and 60-day price protection policy.

Things You Will Get:

  • Powered Sub Woofer

"I would buy this product again and again"


We use this in our Live Band set up. It is great if you can afford at least two of these. One will do god in small venues

Grupo Candela de Santa Ana, CA

Santa Ana, CA


Professional quality and design


Used with the kw122 mains this makes a great sounding system for large rooms and small to moderate outside venues.


Near Toledo, Ohio




All I can say is that this sub is amazing. The built in power amp is quiet and puts out all the wattage you need to make this 18 inch woofer roar. Pair this with some matching QSC powered monitors, and you have a PA rig that you can take on tour, use at practice, or for shows of any size. This is a real hands on product review from [email protected] Sam Ash Indianapolis.


Indianapolis, IN


This sub brings the BASS!!!!


Powerful Amazing Sounding sub by QSC!!! 1000watts of Sound, this sub brings the low end!!!! Awesome low end!! "This is a real hands on product review from [email protected] Sam Ash Orlando"

Billy B



All about that bass.


The KW181 is a must have for any club. Loud and amazing sound comes from this guy which is perfect for house and dance music. You can feel the bass with this guy. Strudy costruction. This is a hands-on product review by Tamir @ Sam Ash Edison


Edison, NJ


1000 Watt


A wonderful high out put speaker with 100 watts of power and a class D power module. With this speaker, clarity of sound is a given and the sound is crisp and full. Only set back is the size, but it is more than worth it for the sound quality! This is a Sam Ash product review.


Philadelphia, PA


Very Awesome Sub!


The QSC KW181 1000 Watt 18" Active Subwoofer is a very cool and versatile subwoofer! This is a great sub for the rest of yuor SQC setup. A great sub for an existing system needing more umph or for your first sub to really get the party started. This is a real hands on product review from Scott @ Sam Ash Queens

The Bearded Guy

Queens, NY


Awesome Sub by QSC


QSC KW181 Powered Subwoofer 18 inch - 1000 watts is a lightweight and rugged for installed sound or portable, a subwoofer with great room coverage, will work for just getting started or adding to an established sound system. This is a real hands-on product review from Rick @ Sam Ash Phoenix.


Phoenix, AZ


Great Speaker


Great sound. Easy to Use. Easy to setup. Portable and easy to carry. Totally worth the money. Lots of FUN! I am a Sam Ash Reviewer at KOP.





If you need a subwoofer to constantly preform as hard as you do look no further! This thing is what you need in your arsenal that you can pull out and wreck the place! Boasting 1000 watts this is no feather weight contender, it is a BEAST! Easy to dial your EQ in for any room or situation. Very versatile it doesn't have to be a wrecking ball all the time, and not to mention very user friendly interface along side that great QSC sound! I am a staff reviewer for Sam Ash

[email protected]



KW181 1000 Watt 18" Active Subwoofer

4.8 20


Other Features Lightweight birch construction for durability and superior sonic performance
Model KW122
Warranty Info:

KW181 1000 Watt 18" Active Subwoofer

The manufacturer's warranty covers parts and labor for six years from date of purchase. The warranty excludes damage from misuse, abuse, and contains other exclusions.

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