I'm getting a LOUD sympathetic ringing of the A string when I play an E on the G string 9th fret. The ringing is an E as well. There's a small amount of ringing when I make the same note on the D string 14th fret, but not nearly as much. This was not happening before I disassembled the bass, but I haven't changed out any of the components yet. Same strings, bridge, tuners, retainer, pups, pots- everything. I've pointed the amp in different directions, tried with the tone knob wide open, fully closed, half volume, full volume. The pup is a reasonable distance from the strings, so I don't think that's the problem. What is going on here? I've never had this kind of problem with any of my basses before, electric, acoustic, or upright. I hope someone here can help.