Cadence FSB10SP 10" 400W Passive Sealed Subwoofer Enclosure

Pure Power, No Limits — The FSB10SP Passive Sub Box

For those who believe in building their system from the ground up, the FSB10SP is your foundation of thunder. This 10-inch passive sealed enclosure doesn’t come with an amp — and that’s the beauty of it. It’s made for the purists, the customizers, the sound architects who demand full control over every watt, every wire, and every drop of bass.

• Raw Bass Potential, Ready to Be Unleashed: With a 200W RMS and 400W peak power handling, the FSB10SP is a powerhouse waiting for the right amplifier to bring it to life. Feed it well, and it’ll reward you with clean, gut-punching bass that fills your vehicle like a tidal wave.
• Sealed Enclosure for Tight, Accurate Hits: Built with a sealed subwoofer box architecture, this enclosure is engineered for accuracy — delivering defined, responsive bass without the boominess. Perfect for music lovers who crave precision as much as power.
• FSB Signature Styling — Aggression Meets Elegance: Draped in premium black carpet and boldly embroidered with Cadence’s iconic orange branding, the enclosure exudes modern muscle. Its forward-facing 10” woofer is shielded by an ABS grille with a sharp, armored design that instantly elevates your trunk aesthetic.
• Wedge-Shaped, Space-Friendly Form: At just 5.2 to 7.3 inches deep, the angled enclosure hugs tight against back seats and cargo walls — giving you maximum bass with minimal space. It’s the kind of smart design that fits real-life vehicles, not just show-floor displays.
• Simple Hookup, Seamless Integration: With push-in speaker terminals, installation is a breeze. Whether you’re building from scratch or upgrading a legacy system, this passive sub enclosure slides into your setup with zero fuss.
• Designed for the Driven: With a sensitivity of 90dB and frequency response reaching down to 35Hz, this sub box doesn’t just play low — it grabs hold of your music’s backbone and shakes it loose. Every kick drum, every drop, every rumble — amplified through your own personal tuning.

The FSB10SP is more than a speaker box. It’s a canvas for your creativity, a blank check of bass potential ready to be signed by your amp of choice. For the builders, the perfectionists, the car audio artists — this one’s for you. Own the sound. Command the build. Start with the FSB10SP.