Strange Fret Buzzing Issue Help Requested

[jasper383]

I recently put a new set of La Bella flats 43-104 on my Precision Bass, and am getting a buzzing on the D and G strings I have never experienced before.

 

From around the 3rd to the 7th fret on the D, and the 3rd to 10th fret on the G string, if I hit a note, the note is fine for about a second, then the string begins to rattle on the frets pretty seriously, almost fretting out sometimes. It really "sizzles", but again, only after about a second of ringing clearly. It's almost like the string sets up a resonance with the neck, and vibrates more after a second or so.

 

Raising the strings has maybe helped a little, and I don't want to get the strings way up off the board. I have the D and G strings set up for 2.5mm, maybe a little more at the 12th fret, with the first fret down. No issues with the E and A strings. I don't think it's the magnetic pull from the pickups.

[BigPigPeaches]

No, it's not the magnetic pull. Most likely the new strings don't have the same tension as the old ones, and the truss rod is pulling too hard now. Did you change gauges, manufacturers, or types of strings, or did you just swap the old Labella Flats out for new ones?

 

In either case, you should be able to resolve this with a quick truss rod adjustment. Loosen the rod by turning it 1/8 of a turn counterclockwise, then let the bass settle in for 24 hours. If the problem is not fixed, loosen it again and keep trying until the buzz goes away.