An affordable AV receiver is always a good option to consider, so Yamaha RX-V583 vs Sony STR DH550 comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Yamaha RX-V583 has 7.2 versus 5.2 for Sony STR DH550. Regarding power, then RX-V583 has such a W/Ohm ratio - 80/8, 145/6 when STR DH550 has a power of 90/6. The THD is the same and is 0.09%.
Characteristics of digital to analog converter (DAC) are different, Burr-Brown 192 KHz/24-bit for RX-V583 and 192 KHz/24-bit for the STR DH550. Only the RX-V583 supports Bi-amping feature. The Yamaha RX-V583 can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Only the Yamaha RX-V583 can connect to the Internet via WI-FI. Only the RX-V583 has Bluetooth support. Only the RX-V583 supports Spotify. Only the RX-V583 provides HDMI signal transmission in standby mode. The RX-V583 can scale the input HDMI signal, unlike the STR DH550. Dolby Vision technology found support only on the RX-V583.
Each receiver has 4/1 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. The RX-V583 supports the protection of digital content of the standard HDCP 2.3, versus HDCP 2.2 in the STR DH550. Receivers do not have a built-in phono stage for connecting a vinyl player. An ECO mode is only available for the RX-V583. The setup assistant will help you configure Yamaha RX-V583.
Only the RX-V583 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the RX-V583.