So I've found the size of the rear speakers.
9.5cm * 15.3cm
4*6 inches if I'm correct...
I remember that I have bought these ones (or similar) from Pionneer :
http://www.pioneer-eur.com/products/car/ts-98en.htm
------------------
-------------------------------------
WEB Site : http://www.adamou.dpn.ch
A.S.C. 1999
-------------------------------------