I have a 2007 Mustang
Convertible V-6 which I purchased last week. It has the Pony Trim and the Shaker Radio. At low or no volume there is a sound like a fan running which seems to be coming from inside the dash. Turn the radio off and the sound goes away. Turn the radio up and you cannot hear the sound.
Might the Shaker radio have a cooling fan ?
Any other ideas, much appreciated.