Hey guys, hope you can bring light into the dark. I have A3 8L Bj. 99 with Bose equipment Since recently my boxes have been virtually out. Radio is still active/can be operated. Nothing comes from the boxes. Sub/ power stage (not sure what) [left in the trunk behind the cover] give a permanent clapping again similar to the flasher noise, I turn on the volume button changes for the moment of turning the interval. For the first time it was Saturday. Yesterday, too. Together with both rides that was up to a stop with ignition, the radio was not on. Today, however, he also didn’t want to work right after the start. Yesterday evening, when I turned it off, it worked without any problems. Currently, I can neither reproduce nor fix the problem, you hope you have a solution ready. If it helps, I can also try to record the noise. Thanks already!