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QSC

QSC KS118 Active 18" Subwoofer

Based on 74 reviews
Condition: New
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$2,199.98
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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2027

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Availability: 18 left in stock
Fulfilled by Frontrow Tech LLC
Arrives Saturday, Nov 7
Order within 19 hours and 10 minutes

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At a glance

Condition
New
Model
KS118
Dimensions
36"D x 30"W x 23"H
Weight
104 lb
Color
NEGRO
Frequency Response
98 hertz
Audio Output Mode
Omnidirectional
Warranty
6-Year Warranty with product registration
Works with
Smartphone, Tablet, Laptop

Features 7

  • A very high output active subwoofer producing impressive low frequencies for mobile entertainment, AV production, clubs and performance venues
  • Features an 18" direct radiating driver powered by a 3600W Class D amp, to deliver high SPL with dynamic and musical sound reproduction of very low frequencies
  • On-board DSP optimizes and protects system performance as well as offers advanced capabilities such as the ability to array two units in a cardioid arrangement
  • Highly transportable, the rugged enclosure features comfortable handles with a professional and elegant appearance in any application, plus four low noise casters

Description

The KS118 is a very high output active subwoofer producing impressive low frequencies for mobile entertainment, AV production, clubs and performance venues. Featuring an 18-inch direct radiating driver powered by a 3600 watt class D amplifier, the KS118 delivers high sound pressure levels with dynamic and musical sound reproduction of very low frequencies. On-board DSP optimizes and protects system performance as well as offers advanced capabilities such as the ability to array two units in a cardioid arrangement. Highly transportable, the rugged enclosure features comfortable handles and four low noise casters. An M20 Threaded pole receptacle accepts a 35 mm pole for easy vertical deployment with full-range loudspeakers.

Specs 41

Brand QSC
Speaker Maximum Output Power 3600 watts
Frequency Response 98 hertz
Connectivity Technology RCA, XLR
Audio Output Mode Omnidirectional
Mounting Type Pole Mount
Enclosure Material Plastic Or Metal
Speaker Type Subwoofer

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Nov 7

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

Very powerfull subwoofer
I will give it 5 star. Because I am using this subwoofer since 2020 and I can confirm that this is a monster. The punches that it gives is superior than a lot of double speaker sub. I would like to buy another one, but unfortunately the price plus shipping to Angola can cost over 5.000$. The only thing that I can do is just see it on Amazon. But if you buy it you wont be disapointed. ... show more
Reviewed in the United States on July 24, 2026 by Belmo
Powerful Sub for Mobile DJ Events
The QSC KS118 is a beast of an 18-inch powered subwoofer, delivering chest-thumping bass down to 35Hz that’s ideal for weddings, parties, and larger gigs in my mobile DJ setup. Its 3,600W Class D amp drives massive SPL up to 136dB peak, pairing perfectly with QSC tops like my KC12s for full-range punch. Key Strengths • Deep extension in DEEP mode and cardioid array option (with 2+ units) rejects rear sound, keeping bass focused on the dance floor without stage bleed. • Built-in DSP with presets, gain control, and low-noise fan make setup simple for quick loads in Western NY venues up to 60 miles out. • Rugged plywood cabinet with casters (77 lbs) handles road abuse; M20 pole mount stacks easily with mains. Most Important to Know Omni or cardioid modes optimize for any space—cardioid shines for stage use. Runs clean even pushed hard, with musical lows that fill rooms effortlessly for all genres. What Other Customers Should Know Pros like DJs rave about its output-to-size ratio over older models; EQ right and it thumps without distortion. ... show more
Reviewed in the United States on February 21, 2026 by Andrew Correa
Powerful portable Great quality
Love this Sub. Great sound and response. Powerful
Reviewed in the United States on January 31, 2026 by Joey Uranga
The real deal.
This is an excellent unit for my mobile wedding / pub gigs. There are products that go 'lower' or go 'louder' but this thing delivers excellent punchy bass that fills the room day-in and day-out at a great price. Combine it with a screw-in type crank-handle speaker pole and you have a solid base for even the biggest tops. Pairs great with my 68lb SRX812's. The included built-in casters are quiet and strong. Don't forget to order the factory cover to keep your investment safe! ... show more
Reviewed in the United States on December 3, 2021 by DJ Outlît
Issues with this sub
Loved the sound when it worked...casters would rattle, but that's an easy fix. This sub stopped working after being used 3 times. The first time I used it, there was an odd odor coming from the speaker. The next two times it worked fine, no odor. I always test my equipment prior to gigs, as I got ready for the 4th gig, this sub would power on, no sound. It's been in the shop since the last week of September with an amp module on order and no real date as to when it'll get fixed as everything is backordered. I do have another sub at home, but I regret selling my 181s now as I never had issues with those and had them for years. I never had trouble with any QSC equipment until now, so I'm not sure I'll be purchasing any additional QSC equipment in the near future and definitely won't buy this sub again until they have fixed the issues. ... show more
Reviewed in the United States on August 28, 2021 by Vince
Great Subs!
I bought 2 of these before the TARRIFFS. Now they are$500 more everywhere.... these are Great subs for djs.
Reviewed in the United States on September 17, 2025 by Charles Galloway
Awesome product!!!
Is this sub slightly over price, Yep!! Is it worth the money especially if your a moble Dj, Yep!! Does this sub hit hard and sounds impressive, abso-fu@king-lutely!! (check out what most clubs use) Is it a solidly build unit, Yep!! Are there better subs out there, Yep!! Would I buy a second one, yep already did. ... show more
Reviewed in the United States on April 3, 2020 by RICK L
Shipment not so great sub arrived damaged
Review Image by Amazon Customer
Sub itself was good shipment not so much it arrived damaged.
Reviewed in the United States on February 6, 2020 by Amazon Customer
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