Yamaha AVENTAGE RX-A680 vs Yamaha RX-V677 – that is a question.
AV receivers under review have the same number of channels. In terms of power, there are differences, the AVENTAGE RX-A680 has such a ratio W/Ohm - 115/8, 145/6, while the RX-V677 has a power of 90/8, 150/4. The value of total harmonic distortion is also different, and for the AVENTAGE RX-A680 it is 0.08%, but for the RX-V677 it is 0.09%.
The manufacturer installed different DACs, the AVENTAGE RX-A680 received the model Burr-Brown 384 KHz/32-bit, but the RX-V677 is equipped with Burr-Brown 192 KHz/24-bit. Each of the compared opponents supports Bi-amping. Both Yamaha AVENTAGE RX-A680 and Yamaha RX-V677 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. The contenders have differences in the supported services from Apple - AirPlay, AirPlay 2 versus AirPlay respectively. Access to the Spotify service is on each of the competitors. The number of available streaming services varies for receivers, the Yamaha AVENTAGE RX-A680 works with Deezer, TIDAL, Pandora, Napster, SiriusXM, Qobuz, but the Yamaha RX-V677 works with Pandora, Napster, JUKE. The quality of 4K/60Hz signal remains unchanged when transmitting from a source to a TV or projector via HDMI for both receivers. Signaling over HDMI in standby mode can provide the AVENTAGE RX-A680 and the RX-V677. Each of the devices can increase the resolution of the incoming video signal. Operation with the Dolby Vision is only possible with the AVENTAGE RX-A680.
The number of HDMI inputs/outputs varies depending on the receiver, the AVENTAGE RX-A680 has 4/1, and the RX-V677 has 6/1. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is only supported by the AVENTAGE RX-A680. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. The AVENTAGE RX-A680 has support for the standard HDCP 2.3, compared to the RX-V677, which supports the standard HDCP 2.2. Unlike most receivers, our models do not have a built-in phono stage for connecting a vinyl player.
Ability to create 2 Multi zones inherent in both AV receivers. There is an ECO mode in either AV receiver. The Yamaha AVENTAGE RX-A680 and the Yamaha RX-V677 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the AVENTAGE RX-A680. Only in the AVENTAGE RX-A680 realized a DTS:X surround technology.