The Yamaha RX-V675 vs Onkyo TX-NR797 comparison proves that these receivers have many common features.
A significant difference between the receivers in the number of channels, Yamaha RX-V675 has 7.2 versus 9.2 for Onkyo TX-NR797. Regarding power, then RX-V675 has such a W/Ohm ratio - 90/8, 150/4 when TX-NR797 has a power of 100/8, 220/6. The THD is 0.09% for the RX-V675 but 0.08% for the TX-NR797.
Characteristics of digital to analog converter (DAC) are different, Burr-Brown 192 KHz/24-bit for RX-V675 and AK4458 384 KHz/32-bit for the TX-NR797. Both the RX-V675 and the TX-NR797 support Bi-amping. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Only the Onkyo TX-NR797 can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. The Yamaha RX-V675 has support for AirPlay, and its competitor in our comparison - AirPlay, AirPlay 2. Spotify can be used on each receiver. The RX-V675 can work with the audio stream from Napster, and the TX-NR797 can receive a content from Deezer, TIDAL, Pandora, TuneIn Radio. 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 rivals can scale the resolution of the incoming HDMI signal. The HDR standard - Dolby Vision is supported by these receivers.
The Yamaha RX-V675 has 6/1 HDMI inputs/outputs versus 7/2 HDMI connectors of the Onkyo TX-NR797. The HDMI Audio Return Channel (ARC) feature supports both devices. Unfortunately, HDMI eARC is not available on monitored devices. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. Both models support the standard HDCP 2.2. The TX-NR797 has a built-in phono stage for connecting a vinyl player.
The RX-V675 supports 2 Multi-room zones, versus 3 for the TX-NR797. An ECO mode is only available for the RX-V675. The setup assistant will help you configure Onkyo TX-NR797.
Only the TX-NR797 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the TX-NR797.