B string buzz only when fretting the low E on the 7th fret.

[Pdubs76]

What’s going on here?

[cliff_the_stiff]

weird. maybe an overtight trussrod?

[RRuskin]

Originally Posted by Pdubs76

What’s going on here?

Buzz or sympathetic vibration? The note you're fretting is a "B" an octave down from the 2nd string.

[Bob from Brooklyn]

Originally Posted by RRuskin

Buzz or sympathetic vibration? The note you're fretting is a "B" an octave down from the 2nd string.

I used to get strange buzzes when I capo'd my 00015sm at the 7th fret. After much trouble shooting I discovered that the open G was causing a sympathetic vibration on the E string. I remedy it sticking a 2nd capo up the neck.

Maybe this guy discovered something similar.

[Pdubs76]

Originally Posted by RRuskin

Buzz or sympathetic vibration? The note you're fretting is a "B" an octave down from the 2nd string.

I’m not sure how to tell the difference. I should say that the guitar is in an open tuning.

[RRuskin]

Originally Posted by Pdubs76

I’m not sure how to tell the difference. I should say that the guitar is in an open tuning.

If you aren't fretting the offending string, it's not a buzz. Either it or something else is causing the unwanted vibration. Make certain that all your tuning gears are snug and that any onboard electronics, including the wires, battery, battery holder, & endpin jack aren't the source.

[vanpatten]

I had a similar vibration issue on my Martin 000-15m. The open B string would buzz when fretting the low E at the 11th or 12th fret. Turns out it wasn’t the B string buzzing, it was the low E buzzing before the fretted note when the open B was played. So it was some kind of sympathetic vibration. I got rid of it by loosening the truss rod a tad. So check your relief and for high frets that could cause something similar. Hope that helps.

So in other words, your low E string might be buzzing before the 7th fret when you fret that note and play the B. If you use two fingers and fret the 7th and use a different finger to simultaneously fret a lower note on the E string do you still hear the buzzing? That’s how I diagnosed mine. It drive me crazy. Sorry it’s kind of hard to explain.