The Yamaha RX-V377 vs Onkyo TX-RZ820 comparison will be extremely helpful for people who want to get a great, powerful receiver with many functions.
The number of channels for receivers is different - 5.1 versus 7.2, respectively, for devices. In terms of power, there are differences, the RX-V377 has such a ratio W/Ohm - 100/8, 135/6, while the TX-RZ820 has a power of 160/8. The value of total harmonic distortion is also different, and for the RX-V377 it is 0.09%, but for the TX-RZ820 it is 0.08%.
The manufacturer installed different DACs, the RX-V377 received the model Burr-Brown 192 KHz/24-bit, but the TX-RZ820 is equipped with AK4458 384 KHz/32-bit. The Bi-amping function is implemented only in the Onkyo TX-RZ820. Both Yamaha RX-V377 and Onkyo TX-RZ820 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. There is a Bluetooth protocol at the TX-RZ820. The TX-RZ820 has access to the Spotify service. 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 RX-V377 and the TX-RZ820. None of the devices can increase the resolution of the incoming video signal. Operation with the Dolby Vision is only possible with the TX-RZ820.
The number of HDMI inputs/outputs varies depending on the receiver, the RX-V377 has 4/1, and the TX-RZ820 has 7/2. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the RX-V377 and the TX-RZ820. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. RX-V377 and TX-RZ820 support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Onkyo TX-RZ820. Voice control of the basic functions of the receiver is not realized in both models. There is an ECO mode in either AV receiver. The Yamaha RX-V377 and the Onkyo TX-RZ820 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the TX-RZ820. Only in the TX-RZ820 realized a DTS:X surround technology.