I always read that probably up to 5,8cm deep speaker fit into the door but I don’t even get 4,5cm deep. The adapter rings are 25mm and thus correspond almost to the maximum of door panel to door panel. What is far more tragic, the opening where the adapter is on it is not completely free but there is a piece of the tin which fills 2/3 of the opening. If I now have the maximum of the adapter with 2,5cm the sheet at approx. 3,0cm in the way please up to 5,8cm by pa lower adapter does not work because the door panel then strikes will have a maximum of 2-5mm space to cover and the LS also has a bit of frame. In my provisional sketch, the red is the sheet of which I am speaking