It makes sense comparing Marantz AV7703 vs Sony STRZA5000ES because they both are able to give some premium features.
A significant difference between the receivers in the number of channels, Marantz AV7703 has 11.2 versus 9.2 for Sony STRZA5000ES. The THD is 0.08% for the AV7703 but 0.09% for the STRZA5000ES. Both the AV7703 and the STRZA5000ES support Bi-amping. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Only the AV7703 has Bluetooth support. Only the AV7703 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 rivals can scale the resolution of the incoming HDMI signal. The HDR standard - Dolby Vision is supported by these receivers.
The Marantz AV7703 has 8/3 HDMI inputs/outputs versus 6/2 HDMI connectors of the Sony STRZA5000ES. 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 AV7703 has a built-in phono stage for connecting a vinyl player.
Each of the AV receivers from our review supports 3 Multi-room zones. An ECO mode is only available for the AV7703. Both AV7703 and STRZA5000ES 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.