A buzzing bass guitar can be very distracting to bass players, especially when they are playing their bass in a recording studio. If a bass guitar is set up incorrectly, the strings on the bass can buzz against the frets or pickups of your guitar. In order to stop this buzzing, there are several adjustments you can make to your Fender jazz bass, which include adjusting the truss rod, adjusting the string height and adjusting the pickup height.
Adjust the truss rod with an Allen wrench to give the neck of your Fender jazz bass a little bit of relief. Your guitar should come with an Allen wrench made specifically for adjusting its truss rod. The neck of a bass guitar can be straight, bend upward (up-bow) or bend downward (back-bow). If the neck of your bass is straight or back-bowed, the strings may buzz against the frets of your bass. By loosening the truss rod, you can provide some relief that will prevent the strings from buzzing against the frets.
Adjust the string height, or action, to stop buzzing on your Fender jazz bass. If the strings are too low, they will rattle and buzz against the frets on your bass. Adjust the height screws on the saddle of the bridge to raise the action of your bass until the strings no longer buzz on your Fender jazz bass.
Lower the height of your pickups if your bass strings are rattling against them. You can adjust the height of your bass pickups by tightening or loosening the screws holding the pickups in place.