Having had an opportunity to test Yamaha RX-A3070BL vs Onkyo TX-NR545, 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 - 9.2 versus 7.2, respectively, for devices. In terms of power, there are differences, the RX-A3070BL has such a ratio W/Ohm - 165/8, while the TX-NR545 has a power of 100/6. The value of total harmonic distortion is also different, and for the RX-A3070BL it is 0.06%, but for the TX-NR545 it is 0.08%.
The manufacturer installed different DACs, the RX-A3070BL received the model ESS SABRE PRO 192 KHz/24-bit, but the TX-NR545 is equipped with Hi-Grade 384 KHz/32-bit. Each of the compared opponents supports Bi-amping. Both Yamaha RX-A3070BL and Onkyo TX-NR545 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. Access to the Spotify service is on each of the competitors. The number of available streaming services varies for receivers, the Yamaha RX-A3070BL works with Deezer, TIDAL, Pandora, Sirius XM, Napster, but the Onkyo TX-NR545 works with Tunein Radio. 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-A3070BL and the TX-NR545. Video scaling is only possible with the RX-A3070BL. Operation with the Dolby Vision is only possible with the RX-A3070BL.
The number of HDMI inputs/outputs varies depending on the receiver, the RX-A3070BL has 8/2, and the TX-NR545 has 6/1. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the RX-A3070BL and the TX-NR545. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. RX-A3070BL and TX-NR545 support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Yamaha RX-A3070BL.
Unlike the RX-A3070BL where 3 Multi zones is provided, the TX-NR545 works with 2 Multi zones. There is an ECO mode in RX-A3070BL. The Yamaha RX-A3070BL and the Onkyo TX-NR545 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available both models. Only in the RX-A3070BL realized a DTS:X surround technology.