About the JL Audio MM80-HR. A hideaway receiver for your boat. If you want a full-featured marine digital media receiver, but don’t have the space, JL Audio’s MM80-HR might be just the thing you need. This unit is designed to mount out of sight in a cabin or cubby, controlled by the JL Audio MediaMaster® MMR-40. You can also add a wide range of NMEA 2000-compatible multi-function devices, including chartplotters. Plenty of ways to play. You can also plug in a USB thumb drive or portable player and enjoy MP3 and WMA files you’ve ripped from your CD collection. The built-in four channel amp (30 watts RMS x 4) powers the speakers in two separate zones. The MM80-HR has 4-channel preamp outputs for connecting external amps and building up your system. You can use this powerful little receiver to create a three-zone system on your boat. Each zone features a zero-clipping audio circuit to protect your speakers from blowing up while you’re rocking out. Level Control Mode let you adjust all three zones, together or individually. You can also name the zones to make it easier to control your system at a glance. JL Audio designs their marine gear to stand up to salt water, heavy fog, blistering sunlight, and lashing rain. All that hard work leads to quality gear that’s engineered to stand up to the extremes of a marine environment. Hideaway marine digital media receiver. Compatible with other NMEA 2K-ready devices. IPod/iPhone Direct Control via USB. Plays MP3 and WMA files via USB. Built-in amplifier: 30 watts RMS x 4 channels (50 watts peak). Inputs: 2 USB inputs, 2 aux inputs (RCA). Outputs: 4-channel preamp outputs (2-volt front and rear). Dimensions: 9-1/4″W x 2-1/4″H x 5-15/16D.