Except for its age (in Mei 10 years) I have it hooked op to an external receiver. In this case a Denon AVR-1610 (Thanks to Moyoweb back in the days).
The receiver now constantly is shooting into short circuit protection as some kind of issue.
The strange part is that I have all new cables and there are no "real" shorts, and when I think I have fixed it it shoots into protection again.
Hopefully I have now fixed by disconnecting all the connected wires. Keep you posted.
So as I promised an update, so far I haven't had any issues after I disconnected and reconnected the power to the reciever. I think this the initial issue as well.