Denon AVR-S640H vs Sony STR DH550 review

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An affordable AV receiver is always a good option to consider, so Denon AVR-S640H vs Sony STR DH550 comparison definitely makes sense.

Amplifier

Considered AV receivers have the same number of channels 5.2. Regarding power, then AVR-S640H has such a W/Ohm ratio - 75/8, 100/6 when STR DH550 has a power of 90/6. The THD is 0.08% for the AVR-S640H but 0.09% for the STR DH550.

Audio features

Characteristics of digital to analog converter (DAC) are different, 192 KHz/32-bit for AVR-S640H and 192 KHz/24-bit for the STR DH550. None of the models support Bi-amping. The Denon AVR-S640H can transmit an audio signal directly to the amplifier and bypasses any DSP processing.

Connectivity

Only the Denon AVR-S640H can connect to the Internet via WI-FI. Only the AVR-S640H has Bluetooth support. Only the AVR-S640H supports Spotify.

Video features

Only the Denon AVR-S640H has support for High dynamic range (HDR). Only the AVR-S640H provides HDMI signal transmission in standby mode. Both competitors are not able to scale the HDMI signal. Dolby Vision technology found support only on the AVR-S640H.

Extensive connections

The Denon AVR-S640H has 5/1 HDMI inputs/outputs versus 4/1 HDMI connectors of the Sony STR DH550. 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. The AVR-S640H has a built-in phono stage for connecting a vinyl player. An ECO mode is only available for the AVR-S640H. The setup assistant will help you configure Denon AVR-S640H.

Multichannel surround

None of the rivals equipped with Dolby Atmos multichannel audio decoder. The receivers do not support the surround sound technology DTS:X.