I have a Dimarzio x2n and a hybrid Dimarzio quadrail in my guitar. The situation is that I've never really turned them up that loud until the other day (my apartment is full of old people who can't handle noise) I have a hum comming from all three positions on the selector switch. If I turn down the gain or the volume at the guitar it lessens. I'm wondering if Dimarzio high output humbuckers are naturally a little noisy or what the deal could be. Thanks