An affordable AV receiver is always a good option to consider, so Sony STR DH550 vs Yamaha RX-V475 comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Sony STR DH550 has 5.2 versus 5.1 for Yamaha RX-V475. Regarding power, then STR DH550 has such a W/Ohm ratio - 90/6 when RX-V475 has a power of 80/6. The THD is the same and is 0.09%.
Characteristics of digital to analog converter (DAC) are different, 192 KHz/24-bit for STR DH550 and Burr-Brown 192 KHz/24-bit for the RX-V475. None of the models support Bi-amping. The Yamaha RX-V475 can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Both models do not have WI-FI support. Only the RX-V475 has Bluetooth support. Only the RX-V475 supports Spotify.
HDR is not available on each model. Only the RX-V475 provides HDMI signal transmission in standby mode. Both competitors are not able to scale the HDMI signal. The HDR standard - Dolby Vision is not supported by these receivers.
The Sony STR DH550 has 4/1 HDMI inputs/outputs versus 5/1 HDMI connectors of the Yamaha RX-V475. 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. Receivers do not have a built-in phono stage for connecting a vinyl player. A voice control is not available. An ECO mode is only available for the RX-V475. Unfortunately, the setup assistant is not available in each of the models.
None of the rivals equipped with Dolby Atmos multichannel audio decoder. The receivers do not support the surround sound technology DTS:X.