Originally Posted by redwoods22

thanks for checking..

another minor update. i changed my mind about leaving the rears stock and i believe i have figured out a solution i am happy with. i happened to notice that the center channel from an e90 is a direct fit for the e70 rear doors. i was under the impression from what i had read elsewhere that the e90 and e70 speakers were different sizes . are the door and center channels on the e90 different sizes? anyway, the e90 center channel fits the e70 doors. results:

e90 logic7 center -- better than stock, but not by a whole lot. bass is tiny bit better and it seems to play a little louder. not really worth it imo.

e90 individual audio center channel coaxial -- not amazing but better than stock base audio midrange. of course you would expect the treble to be improved since you are adding a tweeter..

next step is to try the individual audio separates up front i guess...