It’s strongly recommended to compare different receivers if you want to choose the best one: Pioneer Elite SC-LX904 vs Pioneer VSX-531.
The number of channels for receivers is different - 11.2 versus 5.1, respectively, for devices. In terms of power, there are differences, the Elite SC-LX904 has such a ratio W/Ohm - 140/8 1KHz, while the VSX-531 has a power of 80/8 20Hz-20KHz, 140/6 1KHz. A common feature for devices is the same total harmonic distortion - 0.08%.
The manufacturer installed different DACs, the Elite SC-LX904 received the model ES9026PRO 384 KHz/32-bit, but the VSX-531 is equipped with 192 KHz/24-bit. The Bi-amping function is implemented only in the Pioneer Elite SC-LX904. Both Pioneer Elite SC-LX904 and Pioneer VSX-531 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. The Elite SC-LX904 has access to the Spotify service. 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 Elite SC-LX904 and the VSX-531. Video scaling is only possible with the Elite SC-LX904. Operation with the Dolby Vision is only possible with the Elite SC-LX904.
The number of HDMI inputs/outputs varies depending on the receiver, the Elite SC-LX904 has 7/3, and the VSX-531 has 4/1. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is only supported by the Elite SC-LX904. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. The Elite SC-LX904 has support for the standard HDCP 2.3, compared to the VSX-531, which supports the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Pioneer Elite SC-LX904. There is an ECO mode in VSX-531. The Pioneer Elite SC-LX904 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the Elite SC-LX904. Only in the Elite SC-LX904 realized a DTS:X surround technology.
The Pioneer Elite SC-LX904 is better receiver in this comparison. Check Pioneer Elite SC-LX904 price