Hello all, I am sure this question has been asked numerous times, but...I am inquiring about the speaker sizes on my 850 GLT w/ Premium Sound. I had been told that the front and rear door speakers are both 5.25", and then the rear deck houses two 6x9"s. However, I have been reading other Volvo websites, which said that a 6.5" speaker will fit in the back door panel, as well as that 6x9"s are too big for the rear deck. I am looking to install Focal Polykevlar components in the front, which come in 5 1/8 inch and 5 3/8 inch midbass sizes...which one will fit? And for the rear deck, which size will fit there (I am planning to install Focal Access speakers there). I read somewhere that some 5x7"s fit, and some 6x8"s fit too...but not all (so how am I supposed to know if I am buying these speakers over the internet)? And lastly, are 6.5"s too big for the rear doorpanel (Focal Access speakers there too). And if anyone knows, do you put coaxial speakers in the rear doorpanel? I thought tweeters were just supposed to go up front?
Thanks for all the help, it is truly appreciated.

Nora