What is better - Denon AVR-S640H vs Yamaha RX-V479BL?
The number of channels for receivers is different - 5.2 versus 5.1, respectively, for devices. In terms of power, there are differences, the AVR-S640H has such a ratio W/Ohm - 75/8, 100/6, while the RX-V479BL has a power of 80/8. The value of total harmonic distortion is also different, and for the AVR-S640H it is 0.08%, but for the RX-V479BL it is 0.09%.
The manufacturer installed different DACs, the AVR-S640H received the model 192 KHz/32-bit, but the RX-V479BL is equipped with 192 KHz/24-bit. None of the compared opponents supports Bi-amping. Both Denon AVR-S640H and Yamaha RX-V479BL can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Wireless Internet access via WIFI is possible on both units. Each of the receivers has a Bluetooth connector. The contenders have differences in the supported services from Apple - AirPlay, AirPlay 2 versus AirPlay respectively. The AVR-S640H has access to the Spotify service.
Support for the HDR function can only boast of the AVR-S640H. The quality of 4K/60Hz signal remains unchanged when transmitting from a source to a TV or projector via HDMI for both receivers. Signaling over HDMI in standby mode can provide the AVR-S640H and the RX-V479BL. None of the devices can increase the resolution of the incoming video signal. Operation with the Dolby Vision is only possible with the AVR-S640H.
The number of HDMI inputs/outputs varies depending on the receiver, the AVR-S640H has 5/1, and the RX-V479BL has 6/1. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the AVR-S640H and the RX-V479BL. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. AVR-S640H and RX-V479BL support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Denon AVR-S640H. There is an ECO mode in either AV receiver. The Denon AVR-S640H and the Yamaha RX-V479BL can be properly configured using the setup assistant.
Generally no support for a Dolby Atmos multichannel audio format. A DTS:X surround technology is not supported by devices from our comparison.