I know this might end in a fight (I hope it doesn't) and I know it's been covered before, but because I find it so much less tedious to follow a new thread rather than wade through older ones, I'm opening up the subject again.
it was the reference to poor mains quality in the current Steve Brock thread that interested me. So, all you knowledgable and not so knowledgeable guys out there, please enlighten me. What do blocks, conditioners and regenerators do? What experience with them do you have? Are they likely to improve the performance of a system that doesn't have an obvious problem like Steve's humming amp? Etc, etc?