The best way to optimize a pair of 901's or any other Bose product is to put them exactly where they belong, IN THE GARBAGE!!! I wouldn't put that shit in my enemies homes( and I have a few enemies too). The owner of one of the local shops here in Cedar Rapids, Iowa told me that at one time many years ago they had a demonstration to show how truly poor the 901's were. They had their best electronics and 2 or 3 other pairs of speakers to compare against the Blose. Well, someone at Blose got wind of it and sent him a cease and desist letter and also threatened to sue his pants off. Since as he says "they have more money than God", he decided to stay in business and remove the offending demonstrations. If I remember correctly, this happened back in the late 70's or early 80's. They must have been pretty scared the truth was coming out to pull a manuver like that.
