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QSC KS118 3,600-watt Powered Subwoofer Used , $1,759.99 - Add to Cart Skip to Product Information

QSC KS118 3,600-watt Powered Subwoofer Used

3,600W Powered Subwoofer with 18" LF Driver, 2 XLR/TRS Inputs, and DSP
Item ID: KS118U4
QSC KS118 3,600-watt Powered Subwoofer

Used Savings!

Save $440.00 when you buy used! What is used gear?

The price below reflects your savings.

Used Savings: $439.100 New for $2,199.99
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QSC KS118 3,600-watt Powered Subwoofer Used

Used Savings!

Save $440.00 when you buy used! What is used gear?

The price below reflects your savings.

Used Savings: $439.100 New for $2,199.99

Beef Up Your PA with 3,600 Watts of Bass

This article was Written By

Our Product Research Team

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Does your PA system need a bass infusion? Get the QSC KS118 — it delivers the goods. This 3,600-watt active subwoofer yields extreme output with impressive low-frequency performance. Its 18-inch long-excursion, direct-radiating driver facilitates exceptional punch while maintaining ample low-end extension. Need more bass for electronic, dance, or club music? No problem. Activate the QSC KS118’s DEEP mode, and you’ll be shaking the rafters. Setup is a breeze, thanks to an adjustable crossover with savable/recallable scenes for common applications. Too much bass onstage? Just add a second KS118, place it in cardioid mode, and you’ll keep the bass in its place. The QSC KS118 also includes an M20-threaded pole socket, swivel casters, and a rugged painted wood enclosure.

The KS Series packs massive power into a lightweight subwoofer

QSC's lightweight yet powerful KS Series sets a new standard for powered subwoofers. Their innovative Class D power modules are the epitome of efficient. Enjoy sonic clarity, robust output, and powerful digital signal processing. Premium-grade materials and advanced construction processes ensure reliability and durability. And deployment options allow for a range of live and installed applications.

QSC products deliver power, reliability, and portability

QSC KS118's PA loudspeakers, power amplifiers, and digital mixers bring live sound into the modern age. For over 40 years, QSC has been producing leading-edge sound products that meet even the most demanding standards. Sweetwater is proud to offer a full lineup of QSC's active PA speakers, passive PA speakers, ultra-efficient power amps, and advanced TouchMix mixers. Built to satisfy any live sound setup, QSC products deliver the perfect combination of power, reliability, and lightweight, compact portability.

QSC KS118 Features:

  • 3,600W 18-in. powered subwoofer
  • 2 XLR/TRS combo inputs accommodate a variety of sources
  • Selectable DEEP mode for extra low-frequency extension
  • Omnidirectional and cardioid radiation modes (cardioid setup requires 2 units)
  • Adjustable crossover and savable/recallable scenes for common applications
  • Built-in limiter safeguards against excessive levels
  • M20-threaded sockets allow deployment in either vertical or horizontal positions
  • Locking IEC power connector prevents unexpected disconnections
  • Low-noise, heavy-duty casters enable easy rolling
  • Rugged painted wood enclosure
What Is Used Gear?

Nearly all the used gear at Sweetwater has been previously purchased as new from Sweetwater. You can count on the fact that we only offer used items that are determined to be fully operational. Our award-winning, factory-authorized service department meticulously inspects all used gear before releasing it for sale. Of course, we stand behind every used item we sell with our exclusive 90-day Used Gear Guarantee. If any used item malfunctions or doesn't perform as expected, simply call your Sweetwater Sales Engineer, and we'll do what we can to make it right.

When you buy a used item at Sweetwater, you get:

  • Used items that have been inspected and tested for full functionality by our factory-authorized techs
  • Quality used equipment that is built to last
  • FREE shipping on most items
  • The gear you want, worry-free with our exclusive 90-day Used Gear Guarantee

Please note that this product is available in limited or single quantities. While we do our best to keep our online product information up to date, we cannot guarantee that this product will be in stock at the time your order is placed (for instance, another customer could be purchasing this product as you read this text). If you would like to verify that this product is in stock prior to making your purchase, please contact us or call toll-free at (800) 222-4700.

Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.