When I attended CEDIA, one of the seminars I was scheduled to attend was called 'Audio Setup Calibration'. I thought it would/might be a useful class, but I was wrong. The guy spent over half of the time telling us how cool he and his company were and then, he proceeded to say that all cable lengths needed to be equal. One of the guys asked if we should coil up the excess and leave it in the walls- he said we should. I'm not sure CEDIA was monitoring the seminars, but I was a bit less than enthusiastic in my review of the course.