It’s strongly recommended to compare different receivers if you want to choose the best one: Sony STR-DH770 vs Onkyo TX-RZ720.
AV receivers under review have the same number of channels. In terms of power, there are differences, the STR-DH770 has such a ratio W/Ohm - 105/6, while the TX-RZ720 has a power of 175/6. The value of total harmonic distortion is also different, and for the STR-DH770 it is 0.09%, but for the TX-RZ720 it is 0.08%.
The manufacturer installed different DACs, the STR-DH770 received the model 192 KHz/24-bit, but the TX-RZ720 is equipped with VLSC 384 KHz/32-bit. Each of the compared opponents supports Bi-amping. Both Sony STR-DH770 and Onkyo TX-RZ720 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. The TX-RZ720 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-DH770 and the TX-RZ720. None of the devices can increase the resolution of the incoming video signal. Operation with the Dolby Vision is only possible with the TX-RZ720.
The number of HDMI inputs/outputs varies depending on the receiver, the STR-DH770 has 4/1, and the TX-RZ720 has 7/2. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the STR-DH770 and the TX-RZ720. When comparing receivers, it becomes clear that only the Onkyo TX-RZ720 has HDMI CEC. STR-DH770 and TX-RZ720 support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Onkyo TX-RZ720.
Ability to create 2 Multi zones inherent in both AV receivers. Voice control of the basic functions of the receiver is not realized in both models. There is an ECO mode in neither AV receiver. The Onkyo TX-RZ720 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the TX-RZ720. Only in the TX-RZ720 realized a DTS:X surround technology.