Getting straight to it, I have a Fender AM Professional 5 string P bass and I love it BUT there are three frets, yes just 3 that enoy the hell out of me. The frets are the 2'nd to the 4'th on the G string ( A, Bb, B ) that buzz, not in a nice way with roundwound strings. I have gotten good enough to set up my basses but this, I can't get right. So far I have tryed three diferent sets of roundwound strings and a few combinations of thrus rod and bridge adjustments and the only setup without compromise and no buzz results in a high string action that is not very nice. I took it to the shop I bought the bass from where they have a luthier and the man made the buzz go away by twisting the hex to give me a higher string action than I managed to get myself with no buzz. To sum this up, the work I have done so far results in either no buzz on those 3 frets but nasty sounding upper octave frets on all strings, or evrythi g good but a higher string action than I am comfortable with. Right now the bass has flats, and it's just perfect but I would like to change to roundwounds for gigs that require that sound. Hope this makes sense.