The Yamaha AVENTAGE RX-A680 vs Denon AVR-X4100W comparison proves that these receivers have many common features.
Considered AV receivers have the same number of channels 7.2. Regarding power, then AVENTAGE RX-A680 has such a W/Ohm ratio - 115/8, 145/6 when AVR-X4100W has a power of 125/8, 165/6. The THD is 0.08% for the AVENTAGE RX-A680 but 0.05% for the AVR-X4100W.
Characteristics of digital to analog converter (DAC) are different, Burr-Brown 384 KHz/32-bit for AVENTAGE RX-A680 and 192 KHz/24-bit for the AVR-X4100W. Both the AVENTAGE RX-A680 and the AVR-X4100W 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 Yamaha AVENTAGE RX-A680 has support for AirPlay, AirPlay 2, and its competitor in our comparison - AirPlay. Spotify can be used on each receiver. The AVENTAGE RX-A680 can work with the audio stream from Deezer, TIDAL, Pandora, Napster, SiriusXM, Qobuz, and the AVR-X4100W can receive a content from Pandora, SiriusXM. Compared AV receivers retain the quality of 4K/60Hz signal when transmitting from a source to a TV or projector. 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 AVENTAGE RX-A680 has 4/1 HDMI inputs/outputs versus 8/3 HDMI connectors of the Denon AVR-X4100W. The HDMI Audio Return Channel (ARC) feature supports both devices. The HDMI eARC is available only on the AVENTAGE RX-A680. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. The AVR-X4100W has a built-in phono stage for connecting a vinyl player.
The AVENTAGE RX-A680 supports 2 Multi-room zones, versus 3 for the AVR-X4100W. It is also worth noting that the ECO mode is presented in each of the receivers. Both AVENTAGE RX-A680 and AVR-X4100W can be configured using the Setup assistant.
Both devices have support for Dolby Atmos multichannel audio format. A surround technology DTS:X is supported only by the AVENTAGE RX-A680.