Unfortunately, you have to cut holes on your dry walls to 藏 lines. The good thing is, filling the holes on the dry wall is not a big deal. One trick, if you need to cut the holes on the ceiling, you'd better cut it at the joint of ceiling and wall;otherwise, hard to fill..
I did my 音箱 lines through the builder, several hundred bucks for this upgrade..if it is a new house and you are keen to have 音箱, you'd better pay this upgrade, no messy work afterwards...