An affordable AV receiver is always a good option to consider, so Sony STR-DN1040 vs Denon AVR-X6700H comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Sony STR-DN1040 has 7.2 versus 11.2 for Denon AVR-X6700H. Regarding power, then STR-DN1040 has such a W/Ohm ratio - 100/6 when AVR-X6700H has a power of 140/8, 175/6. The THD is 0.09% for the STR-DN1040 but 0.05% for the AVR-X6700H. Both the STR-DN1040 and the AVR-X6700H support Bi-amping. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Rivals from our review have Bluetooth support. The Sony STR-DN1040 has support for AirPlay, and its competitor in our comparison - AirPlay, AirPlay 2. Only the AVR-X6700H supports Spotify. HDMI signal transmission in standby mode is implemented in each of the devices. Both rivals can scale the resolution of the incoming HDMI signal. Dolby Vision technology found support only on the AVR-X6700H.
The Sony STR-DN1040 has 8/2 HDMI inputs/outputs versus 8/3 HDMI connectors of the Denon AVR-X6700H. The HDMI Audio Return Channel (ARC) feature supports both devices. The HDMI eARC is available only on the AVR-X6700H. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. The STR-DN1040 supports the protection of digital content of the standard HDCP 2.2, versus HDCP 2.3 in the AVR-X6700H. The AVR-X6700H has a built-in phono stage for connecting a vinyl player.
The STR-DN1040 supports 2 Multi-room zones, versus 3 for the AVR-X6700H. An ECO mode is only available for the AVR-X6700H. Both STR-DN1040 and AVR-X6700H can be configured using the Setup assistant.
Only the AVR-X6700H has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the AVR-X6700H.