Stereo "pop/thump" when turned on
I refitted the standard Concert yesterday but when I connected it up I still had the key in the ignition after turning it off. At the time there was a pop (which sounded like the remote pop you'd get with aftermarket amps and subs fitted).
Now each time I turn the car/radio on, the pop can be heard.
I have Bose in my car.
Anyone any ideas? I left the radio out last night in the hope that it would have cleared over night, but its still doing it.
Have I damaged something?