The Audison AMR 20 BT is an IP66 marine-rated source unit built to keep the music going on the water. Its 3-inch full-color TFT IPS display stays readable in bright sun, while the built-in 4x50 watt amplifier, AM/FM tuner, and Bluetooth let you play what you want without extra gear.

Dual-zone control with separate subwoofer level and a low-pass adjustable crossover lets you tune the cabin and the swim deck independently, and the built-in EQ and battery voltage gauge keep everything dialed in from the helm.