Kicker Solo X Subwoofer Box

The Kicker Solo X Subwoofer Box collection is purpose-built for one thing: extreme performance. Whether you're running a single 10-inch Solo X or a dual 15-inch setup, these enclosures are engineered to deliver the brutal low-end power that Kicker’s top-tier subwoofers are known for. Every enclosure in this lineup is ported and built to precise Solo X specifications, ensuring optimal tuning, airspace, and output no matter the configuration. Available in sizes ranging from 8" to 18", you’ll find options for single or dual subwoofer setups that suit everything from compact builds to full-blown SPL systems.

Choose from unloaded enclosures if you already own your subwoofers, or opt for pre-loaded boxes that come wired, tested, and ready to install. Every box is part of our Proline-X Professional Series, featuring CNC precision cuts, heavy-duty construction, internal bracing, premium OFC wiring, and high-current terminal cups. The enclosures are finished in plush black automotive carpet, featuring clean, aggressive styling that matches the Solo X's attitude.

Pricing includes free shipping within the continental U.S., despite these boxes being extremely heavy and oversized. Freight costs are substantial due to the dense materials and overall dimensions, but we’ve built that into the price to give you clear, upfront value. There are no hidden fees or extra freight charges at checkout—what you see is what you pay.

Explore the full range and find the right Kicker Solo X subwoofer box that matches your build goals, power handling, and enclosure needs.

All About Kicker Solo X Subwoofer Box

Built to Kicker Specifications for Maximum Output

Kicker’s Solo X subwoofers are made for extreme performance, and that requires a precision-built enclosure to match. Every box in this collection is 100% designed to Kicker’s ported enclosure guidelines. This means the internal volume, port area, and tuning frequency are optimized to bring out the best low-end response and output potential. Whether you choose an 8", 10", 12", 15", or 18" enclosure, the airspace and port structure are dialed in for Solo X drivers—nothing is generic or repurposed. These aren’t close approximations; they’re performance-first enclosures that unlock the full capabilities of your subs.

Professional Construction Meets Practical Design

All enclosures in the Kicker Solo X Subwoofer Box collection are part of the Proline-X Professional Series. These boxes feature CNC-cut panels, interlocking dado joints, and rigid internal bracing for strength and vibration control. High-power terminal cups—designed and manufactured in-house—ensure solid electrical connections and clean cable routing. Loaded models include 12-gauge OFC prewiring for maximum current flow. From a single 8" to a dual 18" monster setup, each box is built to handle serious power while maintaining structural integrity and acoustic control.

Style and Versatility in Every Configuration

These enclosures aren’t just strong—they’re clean and consistent in design. All models are wrapped in plush black automotive-grade carpet, styled to match the aggressive look of the Solo X series. You can choose from single or dual configurations, and every size from 8" to 18" is represented. Both loaded and unloaded options are available, giving you flexibility based on your build needs. If you already own Solo X subwoofers, the unloaded versions give you a perfect fit. If you want a plug-and-play solution, the pre-loaded boxes are assembled and tested before shipping.

Whether you’re building a show car, a competition rig, or a high-powered daily driver, this collection gives you the confidence that your enclosure is not the weak link. These aren’t universal boxes—they’re Solo X-specific, professionally tuned, and built to deliver crushing bass with consistency.