YAMAHA RX-V377T 5.1ch AV Receiver with 70W x 5 Power HDMI (4 in / 1 out) with 4K Ultra HD pass- throughâ Discrete Amp Circuit Design, YPAO, Front USB (Universal Serial Bus) input. With new Extra Bass & 4K Ultra HD pass-through, this 5.1-channel AV Receiver is sure to provide great sounding home theatre. * 5-channel powerful surround sound * 100W per Channel (6 ohms, 1 k Hz, 0.9 % THD, 1 ch driven) * 70W per Channel (6 ohms, 20 Hz-20k Hz, 0.09 % THD, 2 ch driven) * 135W per Channel (6 ohms, 1k Hz, 10% THD, 1ch driven, JEITA) * Discrete amp configuration * HDMI (4 in / 1 out) with 4K Ultra HD pass-through for super high resolution images * Front panel USB (Universal Serial Bus) Digital Connection for iPod & iPhone * YPAO sound optimisation for automatic speaker setup * Extra Bass enriches powerful bass sound even with small speakers * Virtual CINEMA FRONT provides virtual surround sound with 5 speakers in front * Multi language colour OSD for enhanced visibility (English, German, French, Spanish, Russian, Italian, Japanese & Chinese) * ECO mode operation for about 20% less power consumption