It’s strongly recommended to compare different receivers if you want to choose the best one: Onkyo TX-SR343 vs Denon AVR-X2700H.
The number of channels for receivers is different - 5.1 versus 7.2, respectively, for devices. In terms of power, there are differences, the TX-SR343 has such a ratio W/Ohm - 100/6, while the AVR-X2700H has a power of 95/8, 125/6. A common feature for devices is the same total harmonic distortion - 0.08%. The Bi-amping function is implemented only in the Denon AVR-X2700H. The model AVR-X2700H can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. The AVR-X2700H has access to the Spotify service. Signaling over HDMI in standby mode can provide the TX-SR343 and the AVR-X2700H. Video scaling is only possible with the AVR-X2700H. Operation with the Dolby Vision is only possible with the AVR-X2700H.
The number of HDMI inputs/outputs varies depending on the receiver, the TX-SR343 has 4/1, and the AVR-X2700H has 6/2. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is only supported by the AVR-X2700H. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. The TX-SR343 has support for the standard HDCP 2.2, compared to the AVR-X2700H, which supports the standard HDCP 2.3. In the presence of a built-in phono stage for connecting a vinyl player only at Denon AVR-X2700H. There is an ECO mode in AVR-X2700H. The Denon AVR-X2700H can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the AVR-X2700H. Only in the AVR-X2700H realized a DTS:X surround technology.