And I swapped it to a 220v transformer also since the country I live in uses a 220v. And the humming... OMFG!!!!! I can't stand the hum!!! I put it in 3~4 and played it and I can hear the hum while I'm playing!!! Like, I don't know much about the amp but is this humming normal? The dude from the repair shop(the guy who swapped the transformer) muttered something about the hum but I couldn't quite catch what he was saying. I live in a quiet neighbourhood and yeah when I turn on the amp it gives this hummmmmmmmmmmm sound, and when I play something like fingerstyle I can hear the hum through it. Of course, with the amp cranked up, I cant' hear the hum. But I'm pretty much at that point, humming won't be a huge issue. Is this normal for a RI Champ? I'm just curious.