Having had an opportunity to test Sony STR-ZA810ES vs Yamaha RX-A880, I’d like to share my impression here to facilitate your choice of a new AV receiver.
AV receivers under review have the same number of channels. In terms of power, there are differences, the STR-ZA810ES has such a ratio W/Ohm - 100/8, while the RX-A880 has a power of 100/8, 160/4. The value of total harmonic distortion is also different, and for the STR-ZA810ES it is 0.09%, but for the RX-A880 it is 0.06%.
The manufacturer installed different DACs, the STR-ZA810ES received the model 384 KHz/32-bit, but the RX-A880 is equipped with Burr-Brown 384 KHz/32-bit. Each of the compared opponents supports Bi-amping. Both Sony STR-ZA810ES and Yamaha RX-A880 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. The contenders have differences in the supported services from Apple - AirPlay versus AirPlay, AirPlay 2 respectively. Access to the Spotify service is on each of the competitors.
The HDR10 function is present in each of the rivals. 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 STR-ZA810ES and the RX-A880. Each of the devices can increase the resolution of the incoming video signal. Each of the participants of the comparison has a Dolby Vision.
The number of HDMI inputs/outputs varies depending on the receiver, the STR-ZA810ES has 6/2, and the RX-A880 has 7/2. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is supported by the STR-ZA810ES and the RX-A880. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. STR-ZA810ES and RX-A880 support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Yamaha RX-A880.
Ability to create 2 Multi zones inherent in both AV receivers. For voice control in the STR-ZA810ES is used Google Assistant, but in the RX-A880 is used Amazon Alexa, Google Assistant. There is an ECO mode in RX-A880. The Sony STR-ZA810ES and the Yamaha RX-A880 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available both models. A DTS:X surround technology is supported by devices from our comparison.