Hey guys, my pbass is buzzing when I hit the open A... If I apply a tiny bit of pressure behind the nut then it stops. Is the slot too wide? How can I fix it? It hasn't been modified in any way. The strings are also very old, would changing them maybe fix this?
When you change the strings, make sure you have more wraps around the A string tuner shaft than you normally would, to give the string enough downpressure. This is very common.