Massive Low-End Power for Large-Scale Events
The QSC KS118 is a high-output, direct radiating 18-inch active subwoofer designed to deliver commanding bass performance for concert-scale sound reinforcement. Engineered for mobile DJs, event production, and demanding live sound environments, the KS118 features a long-excursion 18" driver powered by a 3600-watt Class D amplifier—delivering deep, accurate low-frequency extension down to 35Hz. With onboard DSP, selectable DEEP™ mode, and cardioid array capability, this subwoofer is the go-to choice for professionals needing maximum punch, control, and clarity.
Focused Bass Delivery in a Rugged, Scalable Format
Whether deployed alone or in cardioid stacks, the KS118 excels in large spaces where low-end impact matters. The DSP-driven voicing ensures consistent output across different venue types, while its durable birch enclosure, smooth-rolling casters, and M20 threaded socket make it road-ready and installation-friendly. Pair it with QSC K.2 Series tops for a seamless full-range solution that scales from ballrooms to outdoor festivals.
Performance Control That Adapts to Your Needs
- 3600W Peak Class D Amplifier: Delivers powerful, efficient low-frequency output without distortion, even at sustained high SPLs.
- DEEP™ Mode: Enhances sub-bass presence for playback-intensive events like EDM, hip-hop, or cinematic content.
- Cardioid Functionality: When used in pairs, the KS118 can be configured for directional bass—reducing stage rumble and rear-wall reflections.
Portability & Design That Work As Hard As You Do
- Direct Radiating 18" Woofer: Offers extended low-frequency performance with tight transient response for live or recorded material.
- 15mm Birch Construction: Tour-ready cabinet with ergonomic handles and a tough, textured black finish for durability on the road.
- Integrated Casters & M20 Mount: Built-in transport wheels and pole cup allow quick setup under K12.2 or K10.2 tops.
Where the QSC KS118 Excels
- Festival-Grade DJs: Delivers extended sub-bass energy that fills massive rooms and outdoor spaces without distortion.
- Live Sound Engineers: Perfect match for front-of-house systems requiring ground-shaking low-end with cardioid control.
- Event Production Companies: Scales easily for weddings, corporate galas, or arena-level shows with flexible DSP configuration.
- Houses of Worship: Provides rich, clean bass reinforcement with tight pattern control in reverberant environments.
- Rental Fleets: Built-in casters, locking IEC, and QSC reliability make it ideal for repeat deployment under demanding conditions.
Accessory Spotlight for the QSC KS118 Powered Subwoofer
- QSC KS118 Padded Cover: Designed to fit like a glove, this heavy-duty cover shields your 18" sub from bumps and dust during transport or warehouse storage.
- Pole Mount Kit for Stacked Rigs: Use this threaded M20 speaker pole set to mount a top cab securely over your KS118 for vertical alignment and crowd coverage.
- Tour-Grade 25ft XLR Cable: Eliminate noise on long signal runs from controller to sub in outdoor setups or multi-speaker stacks.
- ATA Trunks for Cables & Controllers: Protect your gear between shows with rugged rolling utility cases ideal for power cables, adaptors, or mixers.
- Buildout Essentials for Mobile Sound: Stock up on speaker adapters, line transformers, and rig-ready cable testers to keep your KS118 system bulletproof.
Control Modes for the QSC KS118 Powered Subwoofer
- DEEP™ Mode: Extends low-end output for bass-heavy content such as EDM, pop, and cinematic playback—ideal for DJs and media events.
- Normal Mode: Balanced voicing for live performance, speech reinforcement, and acoustic music.
- Cardioid Mode: When paired with a second KS118, enables directional bass response—reducing unwanted energy behind the enclosure.
- Variable Crossover: Internal DSP lets you select the ideal crossover point for integration with QSC K.2 Series or third-party tops.
- Preset Save/Recall: Store scene-based configurations for touring, venues, or installation profiles.
Useful Links for the QSC KS118 Powered Subwoofer
Frequently Asked Questions
Does the KS118 support cardioid bass output?
Yes. When using two KS118 subs, you can configure them in a cardioid pattern using built-in DSP to reduce rear-facing low-frequency energy.
Can I pole-mount a speaker on top of the KS118?
Absolutely. It features a top-mounted M20 threaded pole socket for secure vertical deployment with speakers like the QSC K12.2.
What’s the power output of the KS118?
The KS118 delivers up to 3600 watts peak via an efficient Class D amplifier—ideal for large events requiring sustained, high-output bass.
Is the KS118 suitable for rental or touring use?
Yes. It features durable birch construction, integrated casters, and DSP locking features that make it perfect for high-turnover or mobile systems.
Can I use the KS118 with non-QSC tops?
Yes. The internal DSP includes adjustable crossover and delay, making the KS118 compatible with any powered speaker system.
Bring uncompromising bass to your next show with the QSC KS118. From high-impact DJ drops to room-filling live rigs, this sub was built to carry the low-end load—and AVMaxx is here to help you deploy it like a pro.
How to Deploy the QSC KS118 in the Field
- Standard Pole-Mounted Setup: Use the M20 threaded socket with a sub-mount pole to elevate a K.2 Series top speaker directly above the KS118 for clean vertical alignment and tight bass coupling.
- Dual Sub Cardioid Configuration: Position two KS118s in a front-to-back arrangement and enable cardioid mode to minimize low-end spill behind the subs—perfect for stage use or reflective rooms.
- Ground-Stacked Array: Deploy multiple KS118s side by side in large rooms or outdoor spaces for wide bass coverage across a dance floor or front-of-house area.
- Installation Use: Utilize the sub’s DSP presets, crossover alignment, and secure mount features to integrate into permanent venues, churches, or event halls with pro-grade reliability.
Recommended System Pairings for the QSC KS118
- With Powered Tops: Match with the QSC K12.2 and Case Package to build a fully protected, full-range system that’s ready for load-in and performance.
- With DJ Controllers: Feed sub output from a Pioneer DDJ-REV7 for next-level response and vinyl-style control in high-output club or event environments.
- With Mixers: Connect through a Yorkville PGM8 or digital console to manage channels, adjust gain structure, and balance live inputs with sub-heavy content.
- With Key Accessories: Add a threaded speaker pole kit, tour-ready XLR cables, and the KS118 cover to keep your sub protected and signal path clean.
Why Choose the QSC KS118 from AVMaxx?
When low-end performance is mission-critical, AVMaxx delivers more than gear—we deliver confidence. The QSC KS118 is built for serious pressure and nonstop output, and when you order from us, you get access to verified pro-tier inventory, bundled accessories, and real-world deployment advice that saves you time and guesswork.
Every KS118 we ship is backed by QSC’s legendary build quality and our team’s tour-tested knowledge. Whether you’re outfitting a rental fleet, tuning a live rig, or upgrading for outdoor power, we help you match your system, set your gain structure, and protect your gear like a pro.
Trust AVMaxx to bring the boom—with performance, reliability, and expert support built in.
