This model can work in configuration 7.2.2 or 7.2.4 with an additional external amplifier. The receiver has a high power of 120 W/channel at 8 Ohm. The integrated AK4458 DAC handles Hi-Res audio (ALAC, FLAC decoding). Users can listen to music from home wireless (Wi-Fi, Bluetooth) or wired (Ethernet) source, as well as from streaming services Spotify, Tidal, Deezer. There is support for wireless technologies ChromeCast, AirPlay, Play-Fi, and multi-room FlareConnect. The list of surround sound technology supported by the model includes Dolby Atmos, DTS: X and DTS Neural: X. The AV receiver has an MCACC multi-channel speaker calibration system.
The Pioneer SC-LX502 has the power of 220 W/channel at 4 Ohm. There are object-oriented audio formats Dolby Atmos and DTS: X. The device supports popular streaming services: Deezer, Spotify, and TIDAL. Thanks to the integrated technology of Chromecast, AirPlay, and Bluetooth, the unit connected with mobile devices. The MCACC Auto-Calibration System can adapt the sound to any speaker's characteristics. However, compared to the VSX-LX503, this model doesn't support work in the Third Zone. A clear difference between the devices in the Pioneer VSX-LX503 vs Pioneer SC-LX502 comparison is the ability to work with two sets of speakers in the SC-LX502.
The Pioneer VSX-LX503 is better receiver in this comparison. Check Pioneer VSX-LX503 price