I use a 5150 and the original cab, which sound good to me, but I always want what I don't got. There have been some threads about guitar-cabs and it started me to think. Is it possible to change some of the speakers (in my 5150 cab), with different speakers from maybe a mesa-cab and marshall-cab. Maybe replace one 12" with a 10". So in the end you got a cab with a 5150-speaker, a mesa speaker, a marshall speaker and a 10". Can it be done? I know that its not only the speakers that make the sound, also the construction of the cab, but hey you can't get it all...