The Sony STR-DH770 vs Onkyo TX-NR777 comparison proves that these receivers have many common features.
Considered AV receivers have the same number of channels 7.2. Regarding power, then STR-DH770 has such a W/Ohm ratio - 105/6 when TX-NR777 has a power of 110/8. The THD is 0.09% for the STR-DH770 but 0.08% for the TX-NR777.
Characteristics of digital to analog converter (DAC) are different, 192 KHz/24-bit for STR-DH770 and 384 KHz/32-bit for the TX-NR777. Both the STR-DH770 and the TX-NR777 support Bi-amping. The Sony STR-DH770 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Rivals from our review have Bluetooth support. Only the TX-NR777 supports Spotify. Compared AV receivers retain the quality of 4K/60Hz signal when transmitting from a source to a TV or projector. HDMI signal transmission in standby mode is implemented in each of the devices. Both competitors are not able to scale the HDMI signal. Dolby Vision technology found support only on the TX-NR777.
The Sony STR-DH770 has 4/1 HDMI inputs/outputs versus 7/2 HDMI connectors of the Onkyo TX-NR777. The HDMI Audio Return Channel (ARC) feature supports both devices. Unfortunately, HDMI eARC is not available on monitored devices. Of the two receivers in our comparison, HDMI CEC is present only in the TX-NR777. Both models support the standard HDCP 2.2. The TX-NR777 has a built-in phono stage for connecting a vinyl player.
Each of the AV receivers from our review supports 2 Multi-room zones. A voice control is not available. An ECO mode is not present in each of the AV receivers. The setup assistant will help you configure Onkyo TX-NR777.
Only the TX-NR777 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the TX-NR777.