Having had an opportunity to test Pioneer VSX-531 vs Denon AVRX4300H, 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 - 5.1 versus 9.2, respectively, for devices. In terms of power, there are differences, the VSX-531 has such a ratio W/Ohm - 80/8 20Hz-20KHz, 140/6 1KHz, while the AVRX4300H has a power of 125/8 20Hz-20KHz, 165/6 1KHz. The value of total harmonic distortion is also different, and for the VSX-531 it is 0.08%, but for the AVRX4300H it is 0.05%.
The manufacturer installed different DACs, the VSX-531 received the model 192 KHz/24-bit, but the AVRX4300H is equipped with 192 KHz/32-bit. The Bi-amping function is implemented only in the Denon AVRX4300H. Both Pioneer VSX-531 and Denon AVRX4300H can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Wireless Internet connection via WIFI is only possible with AVRX4300H. Each of the receivers has a Bluetooth connector. The AVRX4300H has access to the Spotify service.
Support for the HDR function can only boast of each of the AV receivers. The quality of 4K 60p 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 VSX-531 and the AVRX4300H. Video scaling is only possible with the AVRX4300H. Operation with the Dolby Vision is only possible with the AVRX4300H.
The number of HDMI inputs/outputs varies depending on the receiver, the VSX-531 has 4/1, and the AVRX4300H has 8/3. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the VSX-531 and the AVRX4300H. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. VSX-531 and AVRX4300H support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Denon AVRX4300H. There is an ECO mode in either AV receiver. The Denon AVRX4300H can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the AVRX4300H. Only in the AVRX4300H realized a DTS:X surround technology.
The Denon AVRX4300H is better receiver in this comparison. Check Denon AVRX4300H price