Listen to the indicated side
Wear the L earcup on your left and R on your right. Left should play only through the left output; Right through the right. With speakers, identify the cabinet making the sound rather than which ear hears it. Both sends the same tone to both outputs; it is not a stereo-separation test.
Choose your next check
Use the observation menu for a matching troubleshooting step. Change one setting, then replay the same channel. A listening check cannot certify hardware quality or identify every fault. The test uses your system’s selected output; it does not change your device settings.