Yamaha RX-V685BL vs Yamaha RX-V677 – that is a question.
AV receivers under review have the same number of channels. In terms of power, the receivers have the same performance - 90/8, 150/4. The value of total harmonic distortion is also different, and for the RX-V685BL it is 0.06%, but for the RX-V677 it is 0.09%.
The manufacturer installed different DACs, the RX-V685BL 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 RX-V685BL 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. Both devices can work with such Apple Music services: AirPlay. The RX-V677 has access to the Spotify service. 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 RX-V685BL 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 RX-V685BL.
The number of HDMI inputs/outputs varies depending on the receiver, the RX-V685BL has 5/2, and the RX-V677 has 6/1. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is only supported by the RX-V685BL. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. RX-V685BL and RX-V677 support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Yamaha RX-V685BL.
Ability to create 2 Multi zones inherent in both AV receivers. Voice control of the basic functions of the receiver is not realized in both models. There is an ECO mode in either AV receiver. The Yamaha RX-V685BL and the Yamaha RX-V677 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the RX-V685BL. Only in the RX-V685BL realized a DTS:X surround technology.