thanks for the replies! it's been a long time i'm looking a place to repair a couple of my amps and I think you pointed me to the right place. I have a collection of Rockford amps from the 90's [Punch 800a2, Punch 250a2, Power Punch 250.1, Punch 801S, Power 1001bd] and two of them need some repair. these amps are all made from the USA and a far much much better than the newer models from Rockford not to mention that today almost all of them are already made in China. Anyways thank you!