i have an ampeg b2 head and while im at practice it works fine for about the first 5 mins but after that it starts to cut out and the sound gets really quiet and distorted. if i turn it off for awhile then turn it back on it does the same thing, i also tried switching out all the cords i use,cabs,and bass to see if the problem was with one of them but all had the same result. if anyone has had this happen to them before or may know why this is happening i would be very glad if you could help me out. thanks! 
