Peavey bandit problems

breeding death

The Atheist
Apr 7, 2004
308
0
16
Where No Life Dwells
So i have a peavey bandit 112 who is really freaky.
First i plug in the guitar and start play some riffs. My LOW is on 10(max),
MID on 0 (min) and HIGH is on 10(max)

and the sound is great BUT after a while the sound start to freak out.
Like the sound becomes more louder, more paperish sound. So i start to turn the MID knob around a little but NOTHING happens. Its like the amp take the control over the MID freqen. Plz help me, what should i do?! and no, i dont have anyone who can fix it.:ill: