Me again ... I managed to fix it (at least for now). I read on various forums that some tesla owners are getting their sound back after a deep sleep of the car. In deep sleep all these systems get disconnected so I thought maybe just unplugging the amplifier and plugging it back might address the issue ... and guess what? It did
Just reach out to the subwoofer, unplug those wires from the main amplifier and plug them back in (watch out for the safety thingy that needs to be pressed in order to easily unplug the couplings).
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