The Denon AVR-S650H vs Onkyo TX-NR777 comparison proves that these receivers have many common features.
A significant difference between the receivers in the number of channels, Denon AVR-S650H has 5.2 versus 7.2 for Onkyo TX-NR777. Regarding power, then AVR-S650H has such a W/Ohm ratio - 75/8, 100/6 when TX-NR777 has a power of 110/8. The THD is the same and is 0.08%.
Characteristics of digital to analog converter (DAC) are different, AKM 192 KHz/32-bit for AVR-S650H and 384 KHz/32-bit for the TX-NR777. Only the TX-NR777 supports Bi-amping feature. The Denon AVR-S650H can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Rivals from our review have Bluetooth support. The Denon AVR-S650H has support for AirPlay, AirPlay 2, and its competitor in our comparison - AirPlay. Spotify can be used on each receiver. The AVR-S650H can work with the audio stream from Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud, Mood Mix, and the TX-NR777 can receive a content from TIDAL, Pandora.
Both AV receivers support HDR10 technology (High dynamic range). 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. The HDR standard - Dolby Vision is supported by these receivers.
The Denon AVR-S650H has 5/1 HDMI inputs/outputs versus 7/2 HDMI connectors of the Onkyo TX-NR777. The HDMI Audio Return Channel (ARC) feature supports both devices. The HDMI eARC is available only on the AVR-S650H. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. The AVR-S650H supports the protection of digital content of the standard HDCP 2.3, versus HDCP 2.2 in the TX-NR777. These compared receivers have a built-in phono stage for connecting a vinyl player. An ECO mode is only available for the AVR-S650H. Both AVR-S650H and TX-NR777 can be configured using the Setup assistant.
Only the TX-NR777 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the TX-NR777.