It makes sense comparing Denon AVR-S940H vs Yamaha RX-A8A because they both are able to give some premium features.
A significant difference between the receivers in the number of channels, Denon AVR-S940H has 7.2 versus 11.2 for Yamaha RX-A8A. Regarding power, then AVR-S940H has such a W/Ohm ratio - 90/8, 125/6 when RX-A8A has a power of 150/8. The THD is 0.08% for the AVR-S940H but 0.06% for the RX-A8A.
Characteristics of digital to analog converter (DAC) are different, 192 KHz/32-bit for AVR-S940H and 384 KHz/32-bit for the RX-A8A. Only the RX-A8A supports Bi-amping feature. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Rivals from our review have Bluetooth support. The Apple Music service is implemented on considered devices: AirPlay, AirPlay 2. Spotify can be used on each receiver. The AVR-S940H can work with the audio stream from Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud, and the RX-A8A can receive a content from Deezer, TIDAL, Pandora, SiriusXM, Napster, SoundCloud.
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 Denon AVR-S940H has 8/2 HDMI inputs/outputs versus 7/3 HDMI connectors of the Yamaha RX-A8A. The HDMI Audio Return Channel (ARC) feature supports both devices. The HDMI eARC is available only on the RX-A8A. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. The AVR-S940H supports the protection of digital content of the standard HDCP 2.2, versus HDCP 2.3 in the RX-A8A. These compared receivers have a built-in phono stage for connecting a vinyl player.
The AVR-S940H supports 2 Multi-room zones, versus 3 for the RX-A8A. Supported voice control technologies are identical - Amazon Alexa, Google Assistant, Siri, Josh.AI. It is also worth noting that the ECO mode is presented in each of the receivers. Both AVR-S940H and RX-A8A can be configured using the Setup assistant.
Both devices have support for Dolby Atmos multichannel audio format. The surround sound technology DTS:X is supported by devices under review.