I just bought this HUGE peavey amp. Ihave 2 18' woofers and 2 10' highs. First off This amp is like 40 yrs old. It came with a peavey mark III head from the 70's. So I knew it was going to give me problems.Now i need to know whats wrong. I get this insanely annoying buzz. It's really loud. My highs sound like they are about to blow and My Eq is really touchy.