hey I have an alembic f1x and a beringher ep1500 power amp and the last couple of times I plugged it in its sound overdriven. it I let a note ring out it sounds like I have a overdrive pedal on. Last time I practice it did this for 10 minutes. I had a gig tonight and it did nothing and then I went to practice a couple of minutes ago and it started sounding overdriven again. anyone have any ideas?