Attention, DRAWING untrustworthy!

I really want to say at this point just a warning, the supplied installation Sketch has a "Cut Line", ie sawing / cutting lines drawn indicating a radius of 71mm. 71mm are but too much if you want that the supplied rubber gasket also fulfills its purpose and the speaker holds tight. At 71mm radius or 142mm diameter of the seal ring has virtually no bearing surface. Dear in diameter 10mm. Pull off and make the hole 132mm wide. Unfortunately I have left me at the first hole to the drawing and will spare you the trouble. Apart from the drawing, the speakers are good but, would otherwise, given in view of the price, 5 stars.