Hi all I've just bought a '98 306 TD, and the kind soul who previously owned the car had removed the front speakers. I've tried to fit the Alpine SPE-1702, but they seemed to be too deep for the door cavity! I read in the 306 manual that the aperture uses 16.5cm speakers; some articles suggest 17cm and others 16cm. What exact aftermarket speakers do any 306 owners reading this successfully use? Any help and advice *greatly* appreciated. TIA