i tried this in another forum and didn't get enough response to try this out....
i've got 35' each of 2 cat5 and 2 cat 6 run to behind my screen from the laundry room, the shelves in here are 16" deep which will accomodate a bluray and a pre/pro but not the amplifiers, my thoughts are to use baluns for line level audio from the pre/pro to the amlplifiers behind the screen...
or scrap the idea and fish coaxial cable, did i mention i hate attics!