I have had a Hartke B120 for a while now and it has done just fine. Recently though i was practice and suddenly i couldnt hear myself. So i turned the amp off and on again strummed the strings and the amp kind of growled at me. I started checking things and turns out the cable going into the amp was the problem. Tried other ones but when they twist a certain or get pulled one way or hte other it does the same thing. I pulled the cable out a little to get a more positive contact and played fine the rest of practice but i want to solve this problem. This just crappy cable ends or do I need to tighten the female end somehow?