#1
well i plugged in my guitar into my pepman bassline 400 and all the sudden this weird loud noise came up and all of the sudden i hear a buzzing noise. i try playing and the notes still come out, but its all distorted (in a bad way) and the volume is kept really really low, no matter what i do, it stays the same, volume, tone, everything, it refuses to change, anyone know what might have happened? ill be very thankful if i could get an answer

- Micky
#2
Try another cable, that would be the first thing i would check.

then go through a mental checklist, such as things like, has your power gone out recently, has your amp or guitar sustained any damage since you last used it, etc.
#3
probably blew something in your electronics area if its a solid state amp, were you playing really loud for period of time?

edit: also do you have it plugged into a surge protector? if not something may have happened to it.