Yamaha RX-A1070BL vs Onkyo TX-RZ840 comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Yamaha RX-A1070BL has 7.2 versus 9.2 for Onkyo TX-RZ840. Regarding power, then RX-A1070BL has such a W/Ohm ratio - 110/8 20Hz-20KHz when TX-RZ840 has a power of 180/6 1KHz. The THD is 0.06% for the RX-A1070BL but 0.08% for the TX-RZ840.
Characteristics of digital to analog converter (DAC) are different, ESS 192 KHz/24-bit for RX-A1070BL and AKM 384 KHz/32-bit for the TX-RZ840. Both the RX-A1070BL and the TX-RZ840 support Bi-amping. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Both models have the ability to connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. The Yamaha RX-A1070BL has support for AirPlay, and its competitor in our comparison - AirPlay, AirPlay 2. Spotify can be used on each receiver. The RX-A1070BL can work with the audio stream from Deezer, TIDAL, Pandora, Napster, SiriusXM, and the TX-RZ840 can receive a content from Deezer, TIDAL, Pandora, TuneIn Radio. Compared AV receivers retain the quality of 4K 60p signal when transmitting from a source to a TV or projector. HDMI signal transmission in standby mode is implemented in each of the devices. The RX-A1070BL can scale the input HDMI signal, unlike the TX-RZ840. The HDR standard - Dolby Vision is supported by these receivers.
The Yamaha RX-A1070BL has 8/2 HDMI inputs/outputs versus 7/2 HDMI connectors of the Onkyo TX-RZ840. The HDMI Audio Return Channel (ARC) feature supports both devices. The HDMI eARC is available only on the TX-RZ840. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. Both models support the standard HDCP 2.2. These compared receivers have a built-in phono stage for connecting a vinyl player.
The RX-A1070BL supports 2 Multi-room zones, versus 3 for the TX-RZ840. The RX-A1070BL supports voice control via Amazon Alexa, and the TX-RZ840 - Google Assistant. An ECO mode is only available for the RX-A1070BL. Both RX-A1070BL and TX-RZ840 can be configured using the Setup assistant.
Both devices have support for Dolby Atmos multichannel audio format. The surround sound technology DTS:X is supported by devices under review.
The Onkyo TX-RZ840 is better receiver in this comparison. Check Onkyo TX-RZ840 price