What is better - Denon AVR-S640H vs Marantz AV8805?
The number of channels for receivers is different - 5.2 versus 13.2, respectively, for devices. A common feature for devices is the same total harmonic distortion - 0.08%.
The manufacturer installed different DACs, the AVR-S640H received the model 192 KHz/32-bit, but the AV8805 is equipped with AK4490 384 KHz/32-bit. The Bi-amping function is implemented only in the Marantz AV8805. Both Denon AVR-S640H and Marantz AV8805 can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Wireless Internet access via WIFI is possible on both units. Each of the receivers has a Bluetooth connector. Both devices can work with such Apple Music services: AirPlay, AirPlay 2. Access to the Spotify service is on each of the competitors. The number of available streaming services varies for receivers, the Denon AVR-S640H works with Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud, but the Marantz AV8805 works with Deezer, TIDAL, Pandora, SiriusXM, TuneIn Radio.
Support for the HDR function can only boast of each of the AV receivers. 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 AVR-S640H and the AV8805. Video scaling is only possible with the AV8805. Each of the participants of the comparison has a Dolby Vision.
The number of HDMI inputs/outputs varies depending on the receiver, the AVR-S640H has 5/1, and the AV8805 has 8/3. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is only supported by the AV8805. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. AVR-S640H and AV8805 support the standard HDCP 2.2. Like most receivers, our models have a built-in phono stage for connecting a vinyl player. Voice control is performed using Amazon Alexa, Google Assistant, Siri, Josh.AI in both models. There is an ECO mode in either AV receiver. The Denon AVR-S640H and the Marantz AV8805 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the AV8805. Only in the AV8805 realized a DTS:X surround technology.