In this article we will review Yamaha RX-V577 AV receiver. It is created for receiving audio, video and images signals from different sources and their conversion into analogue format with amplification or direct pass-through to other devices for processing. It can accept signals from HDMI, Wi-Fi, AirPlay ( for data receiving in digital format from iPhone, iPad, iPod, Mac and PC devices ), HTC Connect and USB connections. Receiver can transmit audio signal to 7 speakers and 2 subwoofers and can pass-through 4K video signal. It supports YPAO function, which allows to precisely tune speakers position with microphone to obtain optimal sound quality. In stand by mode Yamaha RX-V577 consumes only 0.1 W of energy. For each audio channel it uses separate digital to analog converters ( DACs ), which work on 192 kHz frequency, with 24 bits precision. It has following sound processing effects and technologies : CINEMA DSP, 17 DSP programs, Virtual Presence Speaker, SILENT CINEMA, Virtual CINEMA FRONT, Extra Bass, Dolby TrueHD, Dolby Digital Plus, DTS-HD Master Audio and Dolby Pro Logic IIx. It has 115 W max power output; built in FM/AM tuner; and can be controlled via remote control or smartphone.