If your Acton Bluetooth Speaker is emitting a crackling sound, the likely cause is that the amplifier is clipping if it runs out of power.
You should decrease the volume on your sound source and/or lower the volume or bass boost on the Acton Bluetooth Speaker.
If you cannot troubleshoot your product or believe it to be faulty, please click here to submit a request or contact us via the live chat function in the bottom right corner.