Yamaha RX-V377 5.1-Channel A/V Home Theater Receiver 100 W x 5-channel output for powerful surround sound Discrete amp configuration, HDMI with 4K Ultra HD pass-through for super high resolution images Front panel USB digital connection for iPod and iPhone, YPAO sound optimization for automatic speaker set up Extra Bass enriches powerful bass sound even with small speakers, virtual Cinema Front provides virtual surround sound with five speakers in front Multilingual color OSD for improved visibility, ECO mode operation for about 20 percentage less power consumption