So I was looking at a vintage p bass and the seller said the d string is a little weak. Guess he took it to a pickup guy and said the polarization was reversed or something on that part of the pick up. Does this process change anything to how the bass sounds or change anything else to the tone of the bass? I'm not to familiar with this process or how a pickup can become reverse polarized. Is this a signal for more problems down the road? Thanks for the help!