Having had an opportunity to test Yamaha RX-V4A vs Yamaha R-N602BL, I’d like to share my impression here to facilitate your choice of a new AV receiver.
The number of channels for receivers is different - 5.2 versus 2.0, respectively, for devices. In terms of power, there are differences, the RX-V4A has such a ratio W/Ohm - 80/6, while the R-N602BL has a power of 115/8, 105/4. The value of total harmonic distortion is also different, and for the RX-V4A it is 0.06%, but for the R-N602BL it is 0.01%. The Bi-amping function is implemented only in the Yamaha RX-V4A. Both Yamaha RX-V4A and Yamaha R-N602BL 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 RX-V4A works with Deezer, TIDAL, Pandora, SiriusXM, Qobuz, but the Yamaha R-N602BL works with Deezer, TIDAL, Pandora, Napster, SiriusXM, Qobuz. HDMI signal transmission in standby mode can provide only the RX-V4A. Video scaling is only possible with the RX-V4A. Operation with the Dolby Vision is only possible with the RX-V4A. HDMI Audio Return Channel is only available on Yamaha RX-V4A. HDMI eARC is only supported by the RX-V4A. When comparing receivers, it becomes clear that only the Yamaha RX-V4A has HDMI CEC. In the presence of a built-in phono stage for connecting a vinyl player only at Yamaha R-N602BL. There is an ECO mode in either AV receiver. The Yamaha RX-V4A 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.