Hello.please excuse my gramar mistakes..i'm asking for your help bicause i want to build a power suply for a 2x50w(rms) audio power..and i have 5 (200w each)computer power suply's did anybody now;s how to make them give me 2x40vDC(never mind if curent is smaller)or how to build one smps power suply(a project :?: ) i want them bicause ar smaller,i have a friend wich build 200w smps power suply but he don't want to to show me too,so i decied to learn and found how to build one..