Having had an opportunity to test Sony STR-ZA3100ES 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-ZA3100ES has such a ratio W/Ohm - 70/8, 90/6, 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-ZA3100ES it is 0.09%, but for the RX-A880 it is 0.06%. Each of the compared opponents supports Bi-amping. Both Sony STR-ZA3100ES 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 RX-A880 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 STR-ZA3100ES and the RX-A880. Video scaling is only possible with the RX-A880. Each of the participants of the comparison has a Dolby Vision.
The number of HDMI inputs/outputs varies depending on the receiver, the STR-ZA3100ES 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-ZA3100ES and the RX-A880. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. STR-ZA3100ES 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. There is an ECO mode in RX-A880. The Sony STR-ZA3100ES 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.