I just put a set of P2 pickups (wired in series) and a NTMB preamp into my Lakland 55-01 and have found that when I boost any or all of the EQ controls all the way up or close to all the way up and dig in, I hear clipping (distortion). I have played with the gain trim and it is almost all the way down (can't actually hear much of a difference in output when changing the position of the trimpot). It also doesn't depend on the controls of the amp. Ie: it doesn't matter if the gain is cranked or all the way down and the master is cranked or somewhere in the middle. It also occurs at all volume settings on the bass, low or high and also at generally high or low volumes (overall volume considering bass and amp settings). It also occurs at all pickup blend positions. Is this normal? If not, what could be the problem?