Onkyo TX-NR555 vs Onkyo TX-RZ1100 – that is a question.
The number of channels for receivers is different - 7.2 versus 9.2, respectively, for devices. In terms of power, there are differences, the TX-NR555 has such a ratio W/Ohm - 130/6, while the TX-RZ1100 has a power of 200/6. The value of total harmonic distortion is also different, and for the TX-NR555 it is 0.08%, but for the TX-RZ1100 it is 0.04%.
The manufacturer installed different DACs, the TX-NR555 received the model Hi-Grade 384 KHz/32-bit, but the TX-RZ1100 is equipped with AK4490 384 KHz/32-bit. Each of the compared opponents supports Bi-amping. Both Onkyo TX-NR555 and Onkyo TX-RZ1100 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. Both devices can work with such Apple Music services: AirPlay. Access to the Spotify service is on each of the competitors. The number of available streaming services varies for receivers, the Onkyo TX-NR555 works with Deezer, TIDAL, Pandora, but the Onkyo TX-RZ1100 works with Deezer, TIDAL, TuneIn Radio. The quality of 4K/60Hz signal remains unchanged when transmitting from a source to a TV or projector via HDMI for both receivers. Signaling over HDMI in standby mode can provide the TX-NR555 and the TX-RZ1100. None of the devices can increase the resolution of the incoming video signal. Operation with the Dolby Vision is only possible with the TX-RZ1100.
The number of HDMI inputs/outputs varies depending on the receiver, the TX-NR555 has 6/1, and the TX-RZ1100 has 8/2. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the TX-NR555 and the TX-RZ1100. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. TX-NR555 and TX-RZ1100 support the standard HDCP 2.2. Like most receivers, our models have a built-in phono stage for connecting a vinyl player.
Unlike the TX-NR555 where 2 Multi zones is provided, the TX-RZ1100 works with 3 Multi zones. Voice control of the basic functions of the receiver is not realized in both models. There is an ECO mode in TX-NR555. The Onkyo TX-RZ1100 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available both models. A DTS:X surround technology is supported by devices from our comparison.