I have a Hartke HA3500 and a VX410, sometimes when I play heavy my cab sounds like it farts. I dont think I have a blown driver, I had 1 before and it sounds different than that. On the outlet where my head is plugged into I have TV, DVR, Playstation, and effects pedal and the in summer my AC. Would that effect my heads output and make it dirty when played heavy? I found 1 bad cable that didn't pass a signal. I thought that was the culprit but it still happens. I'm 1 short patch cable that is coiled up from the head to the cab, another 4' from my pedal to the head input and 10 or 12' from bass to pedal. How can I check those cable to sure they are 100% good?