It's just the filter caps that need to be replaced. Definitely shouldn't be every single one in the amp. For more info you'll have to find someone who really knows what they're talking about and hasn't just talked to people who know what they're talking about...as for the old amp I'll shoot you a PM when I'm at my parent's house next and feel like digging it out. It's actually a 'Coral' brand, head and 3x10 cab with proprietary connection so you couldn't use it with another amp without mods. Sucks that way

