Same problem once it dropped below -20 last week. The driver door woofer started crackling intermittently. Weird part is a blown woofer should be crackilling constantly, but it comes and goes. Works fine 90% of the time. If it gets worse Ill book an appointment. Also had to perform a master reset of the MFT as it refused to work though voice control. Nothing would happen when you hit the button. Reset it and it works fine now. Super annoying you cant backup and restore your settings on a flash drive.