The four Neutrik combo connectors (XLR/6.35mm) on the RØDECaster Pro II are intended for connecting microphones, instruments and other line sources and are not specifically designed for stereo signals. These connectors are primarily designed for monophonic signals, although they are flexible enough to accept different types of audio sources.

To connect stereo signals, it would be better to use the USB or Bluetooth inputs, as these are more suitable for transmitting stereo audio. The physical 6.3 mm jack sockets on the rear are mainly intended for monophonic line sources or instruments.