Sometimes my model 3 makes a crackling sound from the left A pillar speaker. This is loosely related to driving on a rough highway. I say loosely because it doesn't happen on every rough road, and sometimes it happens on a smooth road. The audio source doesn't matter, I've heard it on radio, BT, and streaming. Turning down the volume does not make it stop. I'm guessing it's a loose wire or bad amplifier. I first noticed this just a few days after taking delivery. I'm hoping this can be diagnosed quickly at the service center, but unfortunately it takes about 1 month to schedule an appointment.