Alright, so I've had this head for about a month now and everything seemed fine up until a few days ago. My clean channel sounds perfectly fine, but my gain channels sound very flat and muddy as opposed to how crisp they sounded. Perhaps I blew some tubes for leaving standby on too long? (I sometimes forget to turn it off and have left it on for like 2-3 hours at a time). I'm pretty sure it's not my settings unless someone has royally fucked around with them. Is it time for a change in tubes? If so, how do I figure out which tubes blew and which I need to change? This is my first tube amp so I'm very unfamiliar to diagnosing such problems. Any help would be greatly appreciated, thanks.
