taken from product overview on Marantz website:
Front USB Port
Conveniently located on the front panel, the USB port lets you connect a USB memory device, and the port is also iPod and iPhone compatible, with 5V/1A output that lets you charge your device while listening to your favorite tracks. The included remote control also lets you control your iPod or iPhone. A wide range of audio file types are supported, including WAV, AAC, WMA and MP3, with up to 24 bit/192 kHz resolution.
Hence my interpretation of the unit's ability to handle these hi-rez files....