Hey. i have a avatar 2x10 with a peavey mark IV, and ive been using it for over a year and now its been giving me problems. it makes a little crackle noise, its gotten worse lately.here is what ive narrowed it down to... I recently broke my tone knob I was runing the head flat out into the cab, so i know i could have hurt it One of my cables its bad i only have one bass, and one head, so i cant really swap and try new ones. any ideas?