How the speaker test works
Choose Left or Right to verify channel placement, Both to check simultaneous playback, or run the automatic sequence. Start at a comfortable volume.
Stereo utility
Online Speaker Test
Check left, right and stereo speaker output with generated test tones.
STEREO
If one side is silent
Check device balance settings, cables or Bluetooth routing, then repeat the test. A silent channel may be caused by software settings as well as hardware.