It makes sense comparing Denon AVR-X8500H vs Integra DTM-6 because they both are able to give some premium features.
A significant difference between the receivers in the number of channels, Denon AVR-X8500H has 13.2 versus 2.0 for Integra DTM-6. Regarding power, then AVR-X8500H has such a W/Ohm ratio - 150/8, 250/6 when DTM-6 has a power of 80/8. The THD is 0.05% for the AVR-X8500H but 0.08% for the DTM-6.
Characteristics of digital to analog converter (DAC) are different, AK4490EQ 768 KHz/32-bit for AVR-X8500H and AK4438 384 KHz/32-bit for the DTM-6. Only the AVR-X8500H supports Bi-amping feature. The Denon AVR-X8500H can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Rivals from our review have Bluetooth support. The Denon AVR-X8500H has support for AirPlay, AirPlay 2, and its competitor in our comparison - AirPlay. Spotify can be used on each receiver. The AVR-X8500H can work with the audio stream from Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud, and the DTM-6 can receive a content from Deezer, TIDAL, Pandora, TuneIn Radio.
Only the Denon AVR-X8500H has support for High dynamic range (HDR). Only the AVR-X8500H provides HDMI signal transmission in standby mode. The AVR-X8500H can scale the input HDMI signal, unlike the DTM-6. Dolby Vision technology found support only on the AVR-X8500H. Only the AVR-X8500H supports HDMI Audio Return Channel (ARC). The HDMI eARC is available only on the AVR-X8500H. Of the two receivers in our comparison, HDMI CEC is present in only the AVR-X8500H. These compared receivers have a built-in phono stage for connecting a vinyl player.
The AVR-X8500H supports 3 Multi-room zones, versus 2 for the DTM-6. The AVR-X8500H supports voice control via Amazon Alexa, Google Assistant, Siri, Josh.AI, and the DTM-6 - Google Assistant. An ECO mode is only available for the AVR-X8500H. The setup assistant will help you configure Denon AVR-X8500H.
Only the AVR-X8500H has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the AVR-X8500H.