Description
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Sky High Car Audio FMX Series Subwoofers
Available in 6.5” – 18” (excludes 10”)
D1/D2 Ohm Options
FMX: Forged to Perform. Built to Endure.
The FMX Series from Sky High Car Audio is the next evolution of our commitment to high-output, thermally superior yet efficient subwoofers for serious bass enthusiasts. With decades of experience, competitive insight, and
our long standing pursuit of big bass, the FMX Series builds upon our legacy by pushing limits. This isn’t just a bigger sub—it’s a smarter, stronger design for those who demand more from their system.
At the heart of the FMX Series lies a massive3.5” 8 layer high-temp voice coil, the centerpiece of its performance. This coil not only allows fortop-tier excursion of 37mm and xmech at 44mm, but it increases thermal handling byover 50%compared to standard 3” designs—without sacrificing the efficiency that makes Sky High subs musical, responsive, and versatile. The result is a woofer that thrives in high-output builds while staying cool and controlled.
Rated at3500W RMS, the FMX Series is designed for sustained musical power. Aquad-stacked 220mm Y35 ferrite motorgenerates brutal magnetic force. The motor features also include an aluminum shorting ring, pole vents and(4) drilled and tapped backplate holes, giving builders flexibility for reinforced mounting or enhanced cooling. A full-size10” progressive spider packprovides long-lasting mechanical control and suspension stability—key for subs built to dig deep and hit hard. To round out the features we utilize a secondary pressure cap nestled under the primary cap which works as a pressure buffer and structural reinforcement to the primary cap.
Aesthetically, the FMX Series is all business. Each woofer features oursignature forged carbon fiber dust cap, nested into atooled recessfor added cone strength. Afiberglass-reinforced cone support,precision-molded foam surround, and ourtooled SHCA magnet bootcomplete the package in a clean, all-black finish that matches its serious performance.
Connection points include4ga push terminalsdesigned to handle real-world current without compromise. Like all SHCA subwoofers, the FMX is designed forlow FS and high BL, delivering powerful, wideband bass—not just a single-note boom.
Customization Options: Sky High Car Audio is proud to offerin-house custom build optionsfor select subwoofer lines, hand-assembled at our Sparks, NV facility. Customization is available exclusively on theBMX Series 10–18”,FMX Series 12–18”, andFXXL Series 12–18”models. We offer customPrismatic Powders powder coatingin single-stage or two-stage finishes to match your build’s aesthetic (additional cost and lead time apply). For those looking to stand out in the lanes or the show floor,forged carbon fiber cone upgradesare available on FMX and FXXL subs for a premium finish and added cone rigidity. Builders can choose betweendirect leads(with length and color options) orpush terminalson FMX and FXXL models, which come standard with direct leads. We also offerbox support add-onsfor our threaded backplates and optional back platecooling modificationsfor all eligible series (back plate cooling to drop 1/1/26). Lastly we can build you a custom spider pack to meet your needs, but for daily music we highly suggest the stock build form for suspension.
