It makes sense comparing Marantz AV8805 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, Marantz AV8805 has 13.2 versus 2.0 for Integra DTM-6. The THD is the same and is 0.08%.
Characteristics of digital to analog converter (DAC) are different, AK4490 384 KHz/32-bit for AV8805 and AK4438 384 KHz/32-bit for the DTM-6. Only the AV8805 supports Bi-amping feature. The Marantz AV8805 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Rivals from our review have Bluetooth support. The Marantz AV8805 has support for AirPlay, AirPlay 2, and its competitor in our comparison - AirPlay. Spotify can be used on each receiver. The AV8805 can work with the audio stream from Deezer, TIDAL, Pandora, SiriusXM, TuneIn Radio, and the DTM-6 can receive a content from Deezer, TIDAL, Pandora, TuneIn Radio.
Only the Marantz AV8805 has support for High dynamic range (HDR). Only the AV8805 provides HDMI signal transmission in standby mode. The AV8805 can scale the input HDMI signal, unlike the DTM-6. Dolby Vision technology found support only on the AV8805. Only the AV8805 supports HDMI Audio Return Channel (ARC). The HDMI eARC is available only on the AV8805. Of the two receivers in our comparison, HDMI CEC is present in only the AV8805. These compared receivers have a built-in phono stage for connecting a vinyl player.
The AV8805 supports 3 Multi-room zones, versus 2 for the DTM-6. The AV8805 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 AV8805. The setup assistant will help you configure Marantz AV8805.
Only the AV8805 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the AV8805.