I have a 1999 audi a6 and i want to replace teh bose speakers i checked with many sites and they say i have 6 1/2 round speakers but i jsut went to best buy ans they told me i have 5 3/4 round speaker but i measure the speaker grill and it is 4 1/2 by 6 3/4. So i really dont know what size speakers i have. HAs any one measure their speaker because i would like to know without taking teh whole door off. I also have one more question does any one know if you can hook two kenwood powered sub together, same kind.

Thanks for your help