Yamaha RX-V671 vs Sony STR-ZA810ES – that is a question.
The number of channels for receivers is different - 7.1 versus 7.2, respectively, for devices. In terms of power, there are differences, the RX-V671 has such a ratio W/Ohm - 90/8, 150/4, while the STR-ZA810ES has a power of 100/8. A common feature for devices is the same total harmonic distortion - 0.09%.
The manufacturer installed different DACs, the RX-V671 received the model Burr-Brown 192 KHz/24-bit, but the STR-ZA810ES is equipped with 384 KHz/32-bit. Each of the compared opponents supports Bi-amping. Both Yamaha RX-V671 and Sony STR-ZA810ES can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Wireless Internet connection via WIFI is only possible with STR-ZA810ES. Each of the receivers has a Bluetooth connector. The STR-ZA810ES has access to the Spotify service. 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 RX-V671 and the STR-ZA810ES. Each of the devices can increase the resolution of the incoming video signal. Operation with the Dolby Vision is only possible with the STR-ZA810ES.
The number of HDMI inputs/outputs varies depending on the receiver, the RX-V671 has 6/1, and the STR-ZA810ES has 6/2. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is only supported by the STR-ZA810ES. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. RX-V671 and STR-ZA810ES support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Yamaha RX-V671.
Ability to create 2 Multi zones inherent in both AV receivers. There is an ECO mode in neither AV receiver. The Sony STR-ZA810ES can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the STR-ZA810ES. Only in the STR-ZA810ES realized a DTS:X surround technology.