(4) UT65B 6.5" Tower Speakers + PS40 Bluetooth Amplifier For UTV/RZR

This UTV audio kit pairs four Rockville UT65B 6.5" rollbar tower speakers with a PS40 4-channel Bluetooth amplifier for a complete off-road sound system with bigger drivers and more bass than a 5.25" setup. Each pair of UT65B speakers handles 400W peak (100W RMS) through a true coaxial design with a 6.5" polypropylene mica-injected woofer (11 oz magnet, 1.25" Kapton voice coil) and a 1" PEI dome tweeter with neodymium magnet. The frequency response extends down to 60Hz, and a built-in two-way crossover network keeps highs and lows separated cleanly.

The heavy-duty ABS enclosures carry IPX6 water resistance and full marinization against salt, fresh water, rust, and UV damage. Internally sealed silicone terminals add another layer of water protection. The PS40 amplifier pushes dyno-certified 85W x 4 RMS at 2 ohms with an IP65 waterproof rating and built-in Bluetooth for phone streaming without a head unit. Its compact size makes it easy to mount in tight UTV spaces. Adjustable aluminum swivel brackets clamp onto rollbars and wakeboard towers from 1.5" to 2" in diameter with a 360-degree fixed swivel. For UTV, RZR, and side-by-side owners who want more volume and deeper bass on the trail, the 6.5" UT65B delivers a noticeable step up in low-end punch and overall output.