It makes sense comparing Denon AVR-X3600H vs Sony STR-DH590 because they both are able to give some premium features.
A significant difference between the receivers in the number of channels, Denon AVR-X3600H has 9.2 versus 5.2 for Sony STR-DH590. Regarding power, then AVR-X3600H has such a W/Ohm ratio - 105/8, 135/6 when STR-DH590 has a power of 145/6. The THD is 0.08% for the AVR-X3600H but 0.09% for the STR-DH590.
Competitors' digital to analog converter (DAC) is identical to 192 KHz/32-bit. Only the AVR-X3600H supports Bi-amping feature. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Only the Denon AVR-X3600H can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Only the AVR-X3600H supports Spotify.
Both AV receivers support HDR10 technology (High dynamic range). 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 AVR-X3600H can scale the input HDMI signal, unlike the STR-DH590. The HDR standard - Dolby Vision is supported by these receivers.
The Denon AVR-X3600H has 8/3 HDMI inputs/outputs versus 4/1 HDMI connectors of the Sony STR-DH590. The HDMI Audio Return Channel (ARC) feature supports both devices. The HDMI eARC is available only on the AVR-X3600H. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. The AVR-X3600H supports the protection of digital content of the standard HDCP 2.3, versus HDCP 2.2 in the STR-DH590. The AVR-X3600H has a built-in phono stage for connecting a vinyl player. An ECO mode is only available for the AVR-X3600H. The setup assistant will help you configure Denon AVR-X3600H.
Only the AVR-X3600H has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the AVR-X3600H.