Exclusively available through an authorized Yamaha dealer.

Ready to add some ground-pounding bass to your Wolverine X4? The all-new sub woofer solution is a simple plug-and-play expansion to enhance the sound of our accessory Premium Top Audio Starter System or Audio Pod System by SSV Works®, both sold separately. This innovative design features a tuned enclosure mounted underneath the driver seat, keeping it protected from the elements and without losing any storage space.

-Durable fiberglass enclosure that offers both strength and the best sound quality
-Integrated 300W ultra-efficient amplifier
-Kit includes all necessary harnessing, hardware, and clamps for installation
-Highly recommended to be used in conjunction with our accessory Heater Kit and 2nd Battery Kit, both sold separately

For more details click this link BG4-H81D0-T0-00