QSC KW181 1000W 18" Active Subwoofer

QSC KW181 1000W 18" Active Subwoofer

QSC KW181 1000W 18" Active Subwoofer

B&H # QSKW181 MFR # KW181
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Product Highlights

  • 18" Woofer
  • 1000W Class-D Amplifier
  • XLR/TRS Combo Inputs and XLR Outputs
  • Phoenix Remote Connector
  • Integrated DSP with DEEP
  • Intrinsic Correction and GuardRail
  • Pole Socket and Low-Noise Casters
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QSC KW181 overview

  • 1Description

The KW181 from QSC is a professional-quality active 3-way PA loudspeaker. Ideal for low frequency reinforcement of KW-series loudspeakers, the lightweight and rugged birch cabinet houses an 18" woofer to deliver deep, thumping bass with frequencies as low as 35Hz. An efficient Class-D amplifier provides an output power of 1000W for strong audio with low distortion.

The sub offers excellent connectivity, with XLR/TRS combo inputs that accept mic or line signals. Direct XLR line outputs are provided for each channel. Extensive internal DSP includes Intrinsic Correction, DEEP, and GuardRail technologies to provide terrific sonic clarity and component protection for reliable operation.

Onboard control options allow you to adjust EQ to perfectly match your surroundings and applications. You can also use the rear-panel Phoenix connector to connect an external potentiometer (not included) for remote gain control. The sub has a standard 35mm pole socket and a threaded pole for securely mounting a loudspeaker on top of the subwoofer. It also has ergonomic cast-aluminum handles and low-noise casters for easy transport.

Ideal for low frequency reinforcement of KW-series loudspeakers
Lightweight and durable texture-painted birch cabinet with road-worthy 16-gauge steel grille
An 18" woofer delivers deep, thumping bass with frequencies as low as 35Hz
An efficient Class-D amplifier provides an output power of 1000W for strong audio with low distortion
XLR/TRS combo inputs accept mic and line level signals. Direct XLR line outputs are provided for each channel
Intrinsic Correction 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, for excellent performance across the entire sound field
DEEP technology 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 technology protects both the amplifier module and your performance from unnatural and destructive clipping
Multiple EQ modes let you optimize the sub's output for specific applications with the flip of a switch
The onboard LED indicator can be set to illuminate when power is on, to only illuminate when the clip limiter circuit is engaged, or to always be off
The rear-panel Phoenix connector allows you to connect an external potentiometer (not included) for remote gain control. You can even control multiple daisy-chained units from a single control pot
The sub has a standard 35mm pole socket and a threaded pole for securely mounting a loudspeaker on top of the subwoofer
Ergonomic cast-aluminum handles and low-noise casters for easy transport
A locking power cable prevents accidental disconnection, while an automatic standby mode conserves energy and extends the life of the subwoofer
UPC: 684284057839
In the Box
QSC KW181 1000W 18" Active Subwoofer
  • Power Cord
  • Threaded Pole
  • 3-Year Limited Warranty (Extends to 6 Years with Product Registration)
  • Table of Contents
    • 1Description

    QSC KW181 specs

    Active or Passive Active
    Frequency Response 40-112Hz (-6dB)
    35-129Hz (-10dB)
    Amplifier Class-D, 1000W Continuous, 2000W Peak
    Maximum Sound Pressure Level (SPL) 135dB, Peak
    Nominal Sensitivity Not Specified by Manufacturer
    Input Impedance 38 kOhms Balanced, 19 kOhms Unbalanced
    Crossover Not Specified by Manufacturer
    Low Frequency Driver 18" Cone Woofer
    Enclosure Material 15mm Birch Plywood, Black Textured Paint Finish, Black Powder Coated 16-Gauge Steel Grille
    Controls Power
    LF Mode (Norm/DEEP)
    Polarity (Normal/Reverse)
    Front LED (On/Off/Limit)
    Connectors 2 x XLR/TRS Mic/Line Combo Inputs
    2 x XLR Line Outputs
    1 x Phoenix Remote Connector
    1 x Locking Power Connector
    Indicators Power
    Cooling On Demand, 50mm Variable Speed Fan
    Protection Amplifier: Thermal Limiting, Output Overcurrent, Overtemperature Muting, GuardRail
    Transducer: Thermal Limiting, Excursion Limiting
    Power 100-240VAC, 50/60Hz Universal Power Supply
    Consumption 100VAC, 2.3A
    120VAC, 2.01A
    230VAC, 1.13A
    Dimensions (HxWxD) 20.1 x 23.4 x 29.9" (510 x 595 x 761mm) (With Casters)
    Weight 88 lbs (40kg)
    Packaging Info
    Package Weight 120.0 lb
    Box Dimensions (LxWxH) 35.0 x 23.0 x 23.0"

    QSC KW181 reviews

    KW181 1000W 18" Active Subwoofer is rated 5.0 out of 5 by 4.
    Rated 5 out of 5 by from Great Sub! Was looking to make a second larger venue DJ setup with some older 15 powered tops I had. The difference over my non-powered setup (18 and 15 sub/sat) was so noticeable that both kids and adults commented on how pounding the bass was. The limit came on only once, but it was on a note that was so low it always fizzled on my other setup. I did my research on this one and it paid off. This is probably the best powered sub on the market and it is money well spent. And, you don't need a crossover, there is a Low Pass filter built in. Now to save up for the tops! Be sure to buy the cover too, well worth the money.
    Date published: 2012-11-11
    Rated 5 out of 5 by from Good, Clean, Powerful Subwoofer I've been using a pair of these sub for almost 2 months now. I love them. I use them for a band with an audience of 300 - 400. The kick with an Audix D6 mic sounds awesome through these subs. The subs give that powerful umph that you can feel while my mains still reproduce the sound of the kick hitting the drum head. The combination produces a powerful yet clean sounding kick. Bass and synth sound great also. I use the subs with 0 db gain on the rear panel. According to the dial, I can go 10 db louder, but I don't need it. It's loud enough, but it's nice to know that I have extra room to go louder. Solid construction. Love the built in casters, makes transport easy. 6 year warranty. My next purchase will probably be the matching KW 2- way speakers. Very happy with these subs.
    Date published: 2011-09-16
    Rated 5 out of 5 by from QSC KW181 - Awesome Sub!!! I bought the QSC KW181 subs for my mobile DJ system. They are perfect for use in larger venues and take up little space. They are very easy to set up and the casters make it easy to transport. The sound is clean, warm, tight, deep and loud. The KW181s are one of the best sounding powered subs on the market. They really shine when using a DBX DriveRack PX. Helps tune and calibrate your system to any room's acoustics. Highly Recommended!!!
    Date published: 2013-09-24
    Rated 5 out of 5 by from Pro Audio at its best !! We use the KW 181 for both live sound and DJ entertainment. I have 6 of these in my system, 4 KW 153's, and 2 KW 151's. A very warm sound with a unique punch. After 35 yrs playing music, these are by far the most user friendly, and best sounding subs I have ever owned.
    Date published: 2013-03-18
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