The Denon AVR-S640H vs Marantz SR5015 comparison will be extremely helpful for people who want to get a great, powerful receiver with many functions.
The number of channels for receivers is different - 5.2 versus 7.2, respectively, for devices. In terms of power, there are differences, the AVR-S640H has such a ratio W/Ohm - 75/8, 100/6, while the SR5015 has a power of 100/8, 200/6. A common feature for devices is the same total harmonic distortion - 0.08%. The Bi-amping function is implemented only in the Marantz SR5015. Both Denon AVR-S640H and Marantz SR5015 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. 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 SR5015 works with Deezer, TIDAL, Pandora, SiriusXM, Napster, SoundCloud. Signaling over HDMI in standby mode can provide the AVR-S640H and the SR5015. Video scaling is only possible with the SR5015. 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 SR5015 has 6/2. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is only supported by the SR5015. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. The AVR-S640H has support for the standard HDCP 2.2, compared to the SR5015, which supports the standard HDCP 2.3. 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 SR5015 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the SR5015. Only in the SR5015 realized a DTS:X surround technology.