Onkyo TX-NR555 vs Marantz SR7013 comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Onkyo TX-NR555 has 7.2 versus 9.2 for Marantz SR7013. Regarding power, then TX-NR555 has such a W/Ohm ratio - 130/6 when SR7013 has a power of 125/8, 165/6. The THD is 0.08% for the TX-NR555 but 0.05% for the SR7013.
Characteristics of digital to analog converter (DAC) are different, Hi-Grade 384 KHz/32-bit for TX-NR555 and 384 KHz/32-bit for the SR7013. Both the TX-NR555 and the SR7013 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 Onkyo TX-NR555 has support for AirPlay, and its competitor in our comparison - AirPlay, AirPlay 2. Spotify can be used on each receiver. The TX-NR555 can work with the audio stream from Deezer, TIDAL, Pandora, and the SR7013 can receive a content from Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud. 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 SR7013 can scale the input HDMI signal, unlike the TX-NR555. Dolby Vision technology found support only on the SR7013.
The Onkyo TX-NR555 has 6/1 HDMI inputs/outputs versus 8/3 HDMI connectors of the Marantz SR7013. The HDMI Audio Return Channel (ARC) feature supports both devices. The HDMI eARC is available only on the SR7013. 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-NR555 supports 2 Multi-room zones, versus 3 for the SR7013. It is also worth noting that the ECO mode is presented in each of the receivers. The setup assistant will help you configure Marantz SR7013.
Both devices have support for Dolby Atmos multichannel audio format. The surround sound technology DTS:X is supported by devices under review.