Fret buzz only at A str. 13+14 fret??

[Ingemar]

I've got an Peavey Cirrus 35" (neck through)four str. bas with fret buzz only when I fret the A str. at 13+14 fret.Non of the other str. buzzes at any position.
How come??

The relief is 0.50mm and the str. hight measured from fret top to str. bottom at 12 fret is Gstr. 2.2mm - Dstr.2.4mm Astr.2.6mm - E str.2.8mm

The strings are Elixir extra long

[Kronos]

Sounds like you have too much relief in your neck and need to adjust your truss rod. If you feel uncomfortable doing it yourself, take it to a tech or luthier in your area.

If not, there's a sticky thread at the top of this forum that will help.

[Ingemar]

Originally Posted by Kronos

Sounds like you have too much relief in your neck and need to adjust your truss rod. If you feel uncomfortable doing it yourself, take it to a tech or luthier in your area.

If not, there's a sticky thread at the top of this forum that will help.

Thanks for Your answer...but
wouldn't all strings buzz at this frets , in that case?

[jeffhigh]

Check that the buzz is not sypathetic string vibration happening between you finger and the nut. Sometimes this happens when the string length is similar above and in front of your finger. fret the string where it buzzes, then dampen behind where you are fretting.
Happens on my A string like that at fret 13, doesnt come though the amp.
other possibilities are low or high frets

Jeff