An affordable AV receiver is always a good option to consider, so Onkyo TX-RZ720 vs Onkyo TX-RZ730 comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Onkyo TX-RZ720 has 7.2 versus 9.2 for Onkyo TX-RZ730. And as for power, it is the same and equal to 175/6. The THD is the same and is 0.08%.
Characteristics of digital to analog converter (DAC) are different, VLSC 384 KHz/32-bit for TX-RZ720 and AK4458 384 KHz/32-bit for the TX-RZ730. Both the TX-RZ720 and the TX-RZ730 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. Deezer, TIDAL, TuneIn Radio - all of these streaming services have found application in each of the models.
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.
Each receiver has 7/2 HDMI inputs/outputs. 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. These compared receivers have a built-in phono stage for connecting a vinyl player.
The TX-RZ720 supports 2 Multi-room zones, versus 3 for the TX-RZ730. An ECO mode is not present in each of the AV receivers. Both TX-RZ720 and TX-RZ730 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.