Troubleshooting : There is a crackling sound
Short answer
If your Stockwell II emits crackling sounds, the amplifier may be clipping. Troubleshoot by lowering the volume on your audio source or the Stockwell II. Contact support if needed.
If your Stockwell II speaker is emitting a crackling sound, the likely cause is that the amplifier is clipping as it has run out of output power.
You can troubleshoot by decreasing the volume on your audio source, or lower the volume or bass on the Stockwell II speaker.