• Gift Certificate
  • Track Order
  • Help
  • Feedback [+]
  • Ship To: US Flag
  • Shop by Department
  • Hot Deals

MF MD HG Special Financing

QSC KW181 Powered Sub Woofer 18" 1000w  

  • Write a Review


  • K Series performance in a more lightweight design
  • 1000-Watt Class D power module (2 x 500W)
  • Extensive DSP featuring DEEP and Intrinsic Correction enhances system performance
Description & Specs
  • MSRP:
  • Your Savings:
    - $349.01
  • Your Price:

In Stock & Ready To Ship

Gold Coverage: (What’s This?)

+ Add to Wish List

    QSC K/ KW Series Free Tote or Cover Mail-In Rebate

    Purchase any qualifying K or KW series loudspeakers on or between March 1st through June 30th, and receive a FREE tote or cover through mail in rebate.See Details

    Offer expires 06/30/14

    Download Rebate
See All QSC Powered Subwoofers

An 18" sub with 1000 Class D continuous output, and extended bass in a lighter birch enclosure.

Building on the success of QSC's K Series, the KW181 subwoofer, like the rest of QSC's KW active loudspeakers, represents QSC's next evolutionary step in wood enclosure loudspeakers. The system engineers created the KW series to feature all the groundbreaking electronic attributes of the popular K Series while at the same time designing a product that is both smaller and significantly lighter than previous wood enclosure models.

High Output
Like it K series predecessors, 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.

Extensive signal processing is employed throughout the QSC loudspeaker, providing levels of sonic clarity and total output that defy all expectations for a speaker in this category:
•Intrinsic Correction: first featured in QSC's high-end line array products, it maps 65-75 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 an active speaker that behaves equally well across the entire sound field
•DEEP and excursion limiting allow for extended low-frequency response by actively managing low-frequency transients without degradation of the underlying signal or adjacent frequencies
•GuardRail protection, first introduced on QSC's GX Series amplifiers protects both the amplifier module and your performance from unnatural and destructive clipping

The QSC KW181 subwoofer speaker features dual balanced female XLR / 1/4" line level input, dual balanced male XLR full-range line leave out, remote gain control via a potentiometer (sold separately), and a locking IEC power connector.

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.

Premium-grade materials:
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 (included).


  • K Series performance in a more lightweight design
  • 1000-Watt Class D power module (2 x 500W)
  • Extensive DSP featuring DEEP and Intrinsic Correction enhances system performance
  • Rugged, texture-painted birch speaker enclosure
  • 4-position Mic/Line gain
  • Tour-grade, 16-gauge steel grilles
  • Comfortable ergonomic handles
  • 35mm pole sockets with Tilt-Direct

Boost the muscle of your low end without killing your legs and arms like traditional subs. Order the QSC KW181 today!


KW181 Powered Sub Woofer 18" 1000w Specifications:

  • Configuration: 18" subwoofer
  • Transducer: 18" cone transducer
  • Frequency response: (-6dB) 43Hz - 97kHz
  • Frequency range: (-10dB) 39Hz - 145Hz
  • Maximum SPL: (1 meter) 132dB peak
  • Amplifiers
  • Power output: 1000W Class D continuous
  • Input impedance (ohms):XLR/1/4": 38k balanced / 19k unbalanced
  • Controls: Power, Gain, LF Mode (Normal/DEEP), Polarity (Normal/Reverse), Front LED (On/Off/Limit)
  • Indicators: Power, Signal, Standby, Limit
  • Connectors: Dual balanced female XLR/1/4" 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 - 240VAC, 50 - 60Hz
  • AC power consumption (1/8 Power): 100 VAC, 2.3 A, 120 VAC, 2.01 A, 230 VAC, 1.13 A
  • Speaker Enclosure:
  • Material: 15mm painted birch plywood
  • Finish:Black textured paint
  • Grille:Black powder coated 16 gauge steel
  • Dimensions (HxWxD): 20.1" x 23.4" x 29.9" with casters, 510mm x 595mm x 761mm with casters
  • Weight (Net): 88lb. (40kg)
Customer Reviews

Review Snapshot®

by PowerReviews
QSCKW181 Powered Sub Woofer 18" 1000w

(based on 3 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 3 customers

Sort by

Displaying reviews 1-3

Back to top

(3 of 3 customers found this review helpful)


Very Nice Piece of Equipment

By Rasta Linus

from Atlanta, TX

About Me Experienced

Ask me a question

Verified Buyer


  • Compact
  • Durable
  • Easy To Use


    Best Uses

    • Mobile DJ

    Comments about QSC KW181 Powered Sub Woofer 18" 1000w:

    I bought one of these to improve my low end for my mobile DJ business Glad You Came Mobile DJ Entertainment near Texarkana, Texas. I was very impressed instantly with the speaker. It's not very big compared to subs I've used in the past. You've got to get the case that goes along with the 181; it should be mandatory. I'm strongly considering buying another one these to couple them together. In fact, I know I will soon.

    Comment on this review

    (6 of 7 customers found this review helpful)


    QSC KW181

    By Jeff Turk

    from Michigan

    Comments about QSC KW181 Powered Sub Woofer 18" 1000w:

    Quite possibly this is the sexiest piece in my arsenal (I'm a mobile DJ). I've only had the chance to test it out in a HUGE gymnasium - it was great, but not chest thumping. I can't wait to test it out in a more standard (for me) sized room. I'm primarily a wedding DJ, so I imagine most halls will be sufficiently rocked by this sub. But if you're doing school dances or are in much larger venues, I would recommend more than one.
    A little expensive for what it puts out.

    Comment on this review

    (7 of 9 customers found this review helpful)


    Deep, Punchy Lows

    By JohnWylde159

    from Philadelphia, PA

    Comments about QSC KW181 Powered Sub Woofer 18" 1000w:

    Ive recently upgraded to this sub after having the ksub. Instantly this sub blow me away (literally). Its a little bit heavy but all great speakers have some weight to them and with preinstalled casters it makes transporting these an ease. This sub runs could all night for hours and hours no matter how hard u push it, and it takes alot to peak this thing. The only thing that I dislike about this is that the DEEP feature doesnt do that much but you will not need it trust me these things kick. I run 2 of these with the kw12s as tops to complete my setup and plan to pick up 2 more. Do yourself a favor and pick up one of these and make the earth rattle

    Comment on this review

    Displaying reviews 1-3

    Back to top

    You are changing the Ship-To country.

    Our product catalog varies by country due to manufacturer restrictions. If you change the Ship-To country, some or all of the items in your cart may not ship to the new destination.