I have a MIM Fretless Fender Jazzbass. It plays great and sounds very good considering it's all stock. But I have a little problem with this: If I turn both volume knobs all the way off, then slowly turn one of them back to full blast, there is practically no difference at all in volume until it gets to like 90%. Like the volume creeps up really really slowly for 90% of the turn, then when it gets to the last little bit, it just explodes from quiet to full blast. What's up with that? Anyone else have this problem?