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You shouldn’t have to pay extra for a little peace of mind. When you purchase from AMS, you’ll get a free 12-month extended warranty to cover your purchase — and that’s in addition to any manufacturer’s warranties! Thousands of items in our catalog feature the “Gold Lock Extended Warranty,” so you can feel confident in your purchase.
Sometimes the gear on the computer screen seems like a better fit than when you actually get your hands on it. We understand, and that’s why AMS offers an industry-leading 45-day money-back guarantee. If you’re not happy with an item, you have a full month and a half to send it back! We don’t want to just sell you gear. We want to sell you the RIGHT gear — even if it takes a few tries.
Welcome Canadian musicians! Buying your gear from AMS is as easy as going to a local music store, with more selection and more than competitive prices!
Items with this logo are eligible to ship to Canada. Please note that you will be responsible for payment of brokerage fees, duties and other import taxes applicable to your order.
NOTE: Free shipping offers do not apply to Canadian orders. Please be aware of custom fees - such as taxes and duties - when your order arrives. Since these fees vary from location to location, CUSTOMS FEES ARE NOT INCLUDED IN SHIPPING CHARGES. Please check with your local customs office for more information on the fees in your areas. Refusal to pay these fees will result in an undeliverable order. If returned, we do not refund shipping charges and may assess restocking fees to cover return shipping expenses.
Unfortunately, oversized items cannot be shipped using expedited ship methods. They can ONLY be shipped via Ground or Truck delivery.
Don’t sell your soul to a creditor to get the gear you need. At AMS, we want to lower the barriers to create. That’s why we offer in-house 0% financing, and you don’t even have to open a new line of credit! Spread out payments on your credit card to simplify financing and avoid hefty late fees or service charges. Cost shouldn’t interfere with your creativity.
If your low end doesn’t kick people square in the chest, what are you even doing? The QSC KS118 isn’t just another subwoofer — it’s the champion of clean, body-thumping bass. Designed for mobile entertainers, AV pros, and venues that demand serious output, the QSC subwoofer KS118 produces rich, musical low frequencies that hit hard without getting muddy.
Replacing the beloved KW181 and stepping confidently into the modern era, the KS118 brings that signature QSC clarity and power in a fully redesigned, tour-tough package. It’s got a long-excursion 18-inch driver under the hood and a 3600-watt Class D amplifier throwing haymakers down to 41Hz. This subwoofer doesn’t “fill the room” — it owns it.
The QSC KS118 doesn’t mess around. It’s for real-world performance where sound matters, gear breaks, and your reputation is on the line. Whether you’re shaking a wedding tent or holding down a rowdy club night, it's the low-end anchor your system needs.
Of course, like all serious QSC gear, the QSC KS118 specs include a legendary 6-year warranty (with registration) because confidence isn’t just a sound; it’s a policy.
Not every gig needs an 18-inch QSC subwoofer that can summon thunder from the underworld. But if you're asking yourself whether the QSC KS118 is right for your setup, here’s a little gut check:
If your setup needs authoritative low end and you don’t have time for guesswork, the KS118 is the move.
QSC KS118 18-Inch 3600 Watts Active Powered Subwoofer Specifications
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