I have an ashdown EB180 head wih MAG 210T and 115 cabs. Basically, i just went to turn it on just now and there was a faint buzzing sound, then it just got deafeningly loud. I've turned the gain and master volume down, still doing it, removed the guitar lead, still doing it, checked each cab separately, still doing it.
So, any insight as to what may be the problem? I don't have a clue, and i really REALLY don't have the cash to get it fixed.
f***.
EDIT: ta for moving CK