The QSC LS118 Active Subwoofer features wheels for portability, an 18" long excursion direct radiating driver, a 138 DB peak SPL, an Acoustic Linear Phase design, & selectable DEEP Mode
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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.
Earn rewards every time you shop at AMS. You'll collect points on eligible purchases that turn into promotional savings on future gear, with points typically available several days after your order ships. All you need is a free AMS account — no credit card, financing, or payment plan required.
The more you shop, the more you earn. Create a free account and start earning from your very first eligible purchase. Rewards are applied as a discount on future eligible purchases.
Earn rewards every time you shop at AMS. You'll collect points on eligible purchases that turn into promotional savings on future gear, with points typically available several days after your order ships. All you need is a free AMS account — no credit card, financing, or payment plan required.
The more you shop, the more you earn. Create a free account and start earning from your very first eligible purchase. Rewards are applied as a discount on future eligible purchases.
Earn points on eligible purchases with AMS Rewards and turn them into savings on future orders, no credit card required. You can apply points at checkout once they’re available.
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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.
0% Interest
Payment Plan
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.
The QSC LS118 combines powerful low-end performance with smart engineering. This 18-inch subwoofer delivers 4000 watts of controlled, chest-thumping bass that your audience will feel with every beat. What sets it apart is its custom-designed 18-inch driver, built for exceptional excursion and airflow. Paired with a high-efficiency 4000W Class D amplifier featuring Power Factor Correction, it ensures maximum output with optimal efficiency.
Embracing the Subwoofer Life
When it comes to shaking walls and setting the vibe, not all subwoofers are created equal. And the QSC LS118 proves it with features that’ll blow you away — almost literally.
138 dB Peak Output: This thing hits hard enough to wake the neighbors three blocks over, delivering crystal-clear low frequencies that you'll feel as much as hear.
Acoustic Linear Phase (ALP) Design: All your QSC speakers play nice together, creating a cohesive sound field instead of competing frequencies that muddy your mix.
QSC SysNav App Control: Configure, monitor, and fine-tune your entire setup from your phone — because who has time to crawl around adjusting knobs mid-show?
Smart Setup, Smarter Sound
The LS118 isn't just about raw power — it's about putting that power exactly where you need it. The cardioid configuration option lets you focus your low-end forward while keeping it off your stage, so your drummer can actually hear themselves think.
Cardioid Array Capability: Use two or more units to create directional bass that hits your audience hard while keeping stage bleed to a minimum.
Dante Network Integration: Stream digital audio over IP and integrate seamlessly with Q-SYS ecosystems — perfect for complex installations where every connection counts.
Omni or Cardioid Modes: Switch between full 360-degree coverage or focused directional output depending on your venue and needs.
Built Like a Tank, Moves Like a Dream
This subwoofer is designed for the real world, where gear gets loaded, unloaded, and moved more times than you'd like to count. The rugged wooden enclosure with Polyurea coating shrugs off the kind of treatment that would leave lesser subs looking like they've been through a blender.
Heavy-Duty Casters: Four low-noise wheels that actually roll smoothly, even when you're navigating tight backstage areas.
Flexible Deployment Options: Mount it vertically, horizontally, ground-stack it, or pole-mount it — the M20 threaded receivers and mounting options give you the flexibility to adapt to any venue.
Daisy-Chain Connections: Link analog, Dante digital audio, and AC power between units with clean, professional connections that won't fail when you need them most.
The Lowdown on the Low End
The QSC LS118 delivers the kind of low-end authority that turns good sound systems into unforgettable experiences. Whether it's running a simple plug-and-play setup or managing a complex networked installation, this subwoofer gives you the power, precision, and reliability to make every show count.
QSC LS118 Features:
Purpose-designed 18-inch-long excursion driver for maximum low-frequency output
4000W peak Class D amplifier with Power Factor Correction
138 dB peak SPL output with exceptional low frequency performance
QSC Acoustic Linear Phase (ALP) design for coherent multi-speaker deployment
QSC SysNav app for wireless control, monitoring, and signal processing
Dante network integration for digital audio-over-IP connectivity
Selectable DEEP mode for extended low frequency response
Cardioid and omni-directional radiation pattern options
Rugged Polyurea-coated wooden enclosure with heavy-duty casters
Industry-leading 6-year extended warranty with product registration