Please forgive my ignorance, I know jack squat about electronics. I did a search and couldnt find much info on this. SO I have been away for two months and like an idiot I left my amp at my friend's house (where we jam). I came back and as I am tuning up I couldn;t help but notice and God awful crackling sound coming from the amp. It sounds like when you have a bad cable. So I tried a new guitar cable, a new speaker cable between the amp and cabinet (GK amp and cab), and it still makes the same noise. My buddy assures me they didn't trash it or turn it up or anything, but who knows? Anyways, what's the best approach to figuring out what is wrong and fixing it? Ideas?