Originally Posted by BlueSkies

Oscillating hum is a good way to describe it. I will try your method on my next trip. So basically you are keeping the battery pack as far away from the window heat as possible? Thanks for the tip.



I have definitely heard this hum. It's a more constant hum and different from the one that seems to be caused by the ANR. Luckily I can just turn the cabin off when not needed.