An affordable AV receiver is always a good option to consider, so Onkyo TX-RZ730 vs Marantz SR5011 comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Onkyo TX-RZ730 has 9.2 versus 7.2 for Marantz SR5011. Regarding power, then TX-RZ730 has such a W/Ohm ratio - 175/6 when SR5011 has a power of 100/8, 140/6. The THD is the same and is 0.08%.
Characteristics of digital to analog converter (DAC) are different, AK4458 384 KHz/32-bit for TX-RZ730 and 192 KHz/24-bit for the SR5011. Both the TX-RZ730 and the SR5011 support Bi-amping. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
WI-FI modules have the same characteristics: 2.4/5GHz. Rivals from our review have Bluetooth support. The Apple Music service is implemented on considered devices: AirPlay. Spotify can be used on each receiver. The TX-RZ730 can work with the audio stream from Deezer, TIDAL, TuneIn Radio, and the SR5011 can receive a content from Pandora, SiriusXM. 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. The SR5011 can scale the input HDMI signal, unlike the TX-RZ730. The HDR standard - Dolby Vision is supported by these receivers.
The Onkyo TX-RZ730 has 7/2 HDMI inputs/outputs versus 8/2 HDMI connectors of the Marantz SR5011. 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-RZ730 has a built-in phono stage for connecting a vinyl player.
The TX-RZ730 supports 3 Multi-room zones, versus 2 for the SR5011. An ECO mode is only available for the SR5011. Both TX-RZ730 and SR5011 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.