I was thinking the flex stuff because its an exterior wall. There is little clearence in the attic and I wanted to have the flex stuff come out a few feet into the attic and be able to curve away from the roof line so I can get to it. There is also a fire brake and the roof decking is on. So getting a rigid pipe through the firebrake and into the attic might be a hard one.

I was thinking 1.5 or 2" because I could get away with one run possibly. I need it to run at least 6 runs of 12-14ga speaker cable and at least 5 runs of coax. I could maybe do a few smaller runs but would like to find some 1.5 or 2" flex stuff.

Anyone know the hiding place or is it a "pipe" dream