The Marantz AV7703 vs Onkyo TX-SR343 comparison will be extremely helpful for people who want to get a great, powerful receiver with many functions.
The number of channels for receivers is different - 11.2 versus 5.1, respectively, for devices. A common feature for devices is the same total harmonic distortion - 0.08%.
The manufacturer installed different DACs, the AV7703 received the model 192 KHz/32-bit, but the TX-SR343 is equipped with TI Burr-Brown 192 KHz/24-bit. The Bi-amping function is implemented only in the Marantz AV7703. The model AV7703 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. The AV7703 has access to the Spotify service.
Support for the HDR function can only boast of the AV7703. 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 AV7703 and the TX-SR343. Video scaling is only possible with the AV7703. Operation with the Dolby Vision is only possible with the AV7703.
The number of HDMI inputs/outputs varies depending on the receiver, the AV7703 has 8/3, and the TX-SR343 has 4/1. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the AV7703 and the TX-SR343. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. AV7703 and TX-SR343 support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Marantz AV7703. There is an ECO mode in AV7703. The Marantz AV7703 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the AV7703. Only in the AV7703 realized a DTS:X surround technology.