An affordable AV receiver is always a good option to consider, so Yamaha RX-V671 vs Denon AVR-X6700H comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Yamaha RX-V671 has 7.1 versus 11.2 for Denon AVR-X6700H. Regarding power, then RX-V671 has such a W/Ohm ratio - 90/8, 150/4 when AVR-X6700H has a power of 140/8, 175/6. The THD is 0.09% for the RX-V671 but 0.05% for the AVR-X6700H. Both the RX-V671 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. Only the AVR-X6700H supports Spotify. The RX-V671 can work with the audio stream from Napster, and the AVR-X6700H can receive a content from Deezer, TIDAL, Pandora, SiriusXM, Qobuz, TuneIn Radio. 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 Yamaha RX-V671 has 6/1 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 RX-V671 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-V671 supports 2 Multi-room zones, versus 3 for the AVR-X6700H. An ECO mode is only available for the AVR-X6700H. The setup assistant will help you configure Denon AVR-X6700H.
Only the AVR-X6700H has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the AVR-X6700H.