An affordable AV receiver is always a good option to consider, so Yamaha RX-V685BL vs Denon AVR-X6700H comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Yamaha RX-V685BL has 7.2 versus 11.2 for Denon AVR-X6700H. Regarding power, then RX-V685BL has such a W/Ohm ratio - 90/8, 150/4 when AVR-X6700H has a power of 140/8, 175/6. The THD is 0.06% for the RX-V685BL but 0.05% for the AVR-X6700H. Both the RX-V685BL 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.
WI-FI modules have the same characteristics: 2.4/5GHz. Rivals from our review have Bluetooth support. The Yamaha RX-V685BL has support for AirPlay, and its competitor in our comparison - AirPlay, AirPlay 2. Only the AVR-X6700H supports Spotify.
Both AV receivers support HDR10 technology (High dynamic range). HDMI signal transmission in standby mode is implemented in each of the devices. Both rivals can scale the resolution of the incoming HDMI signal. The HDR standard - Dolby Vision is supported by these receivers.
The Yamaha RX-V685BL has 5/2 HDMI inputs/outputs versus 8/3 HDMI connectors of the Denon AVR-X6700H. The HDMI Audio Return Channel (ARC) feature supports both devices. HDMI eARC is available in each model. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. The RX-V685BL supports the protection of digital content of the standard HDCP 2.2, versus HDCP 2.3 in the AVR-X6700H. These compared receivers have a built-in phono stage for connecting a vinyl player.
The RX-V685BL supports 2 Multi-room zones, versus 3 for the AVR-X6700H. It is also worth noting that the ECO mode is presented in each of the receivers. Both RX-V685BL and AVR-X6700H can be configured using the Setup assistant.
Both devices have support for Dolby Atmos multichannel audio format. The surround sound technology DTS:X is supported by devices under review.