Im sorry to raise the subject here again. After searching the board i've found quite a few threads related to my problems, but unfortunately was unable to find a clear description/solution.

What I'm experiencing is not a power down thump. Everthing's fine there.
What i get is a thump at bootup (and only bootup) of the unit... right when the vfd seem to be actuvated and the empeg logo apears i get a loud thump. no matter if in the car or if connected to a stereo intergrated amplifier at my home ...
normal ?