I am having a world of trouble with clip signals and my amp . I am currently running a Crate BXH-220 head and a Sunn 410H cabinet coupled with a Hartke cabinet with one 15 in it . Anything over half volume setting on the amp and I get a constant clip signal . Changed heads and went to a Hartke HA3000 , same thing . Is it possible that the Sunn cabinet is the cause and not the amp itself . I am a new bassist and need some advice . I've even changed guitars to see if that is the problem .