Yamaha RX-V385 vs Yamaha RX-V677 – that is a question.
The number of channels for receivers is different - 5.1 versus 7.2, respectively, for devices. In terms of power, there are differences, the RX-V385 has such a ratio W/Ohm - 70/6, while the RX-V677 has a power of 90/8, 150/4. A common feature for devices is the same total harmonic distortion - 0.09%.
The manufacturer installed different DACs, the RX-V385 received the model Burr-Brown 384 KHz/32-bit, but the RX-V677 is equipped with Burr-Brown 192 KHz/24-bit. The Bi-amping function is implemented only in the Yamaha RX-V677. Both Yamaha RX-V385 and Yamaha RX-V677 can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Wireless Internet connection via WIFI is only possible with RX-V677. 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-V385 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-V385.
The number of HDMI inputs/outputs varies depending on the receiver, the RX-V385 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 RX-V385. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. RX-V385 and RX-V677 support the standard HDCP 2.2. Unlike most receivers, our models do not have a built-in phono stage for connecting a vinyl player. 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-V677 can be properly configured using the setup assistant.
Generally no support for a Dolby Atmos multichannel audio format. A DTS:X surround technology is not supported by devices from our comparison.