Axiom Home Page Forums General Discussion Technical Questions Bass/Rumble from EP500v2 with no audio input

I had an ep500 once that was acting strage. When the gain was set low you could not hear it, but as you gradually increased the gain all of a sudden it would jump like 20dBs. I found if I pushed with my fingers around the amp plate near the gain nob I could recreate the problem. They ended up replacing the amp.