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Double Bass Buzzing on low notes - strings?

I'm checking out a Christopher bass right now. It had helicore orchestral stings on it before and I put a set of belcantos on. In both cases the E string buzzes a little on the bottom four notes when I play pizz. I'm talking a meaty jazz pizz, so it's not all that surprising, but I've played on other basses with lower action and was able to really dig in on the E without the rattle. The action isn't really that low on this bass, and the fingerboard was just planed before I checked it out. Is this just the nature of orchestral strings? Would something like spirocores be less likely to have this problem?
 
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I've actually found that having too tall a nut can actually make buzzing worse. The reason being that when the nut is high, you can't stop the string as well maybe. When you look at basses with C-extensions, they have no clearance at the "nut" yet if they are set up well, will not buzz at all.
 
In my experience a nut that is too high, more than a couple business cards above the fingerboard, can also cause strings to buzz.

myused_romance, would you explain a little more about this...
put a little masking tape on the tuning keys, and it doesn't rattle anymore.
I can see how that might help if it is the tuning key buzzing and not the string, but can't get a picture in my head of where the tape might go :confused:
 
Even if the fingerboard is dressed it could be the problem still. I would get it checked by a luthier, I doubt its a string issue. The bridge could be giving you issues also, especially with the weather changing recently your bass might of swelled up a little with summer coming.
 
In my experience a nut that is too high, more than a couple business cards above the fingerboard, can also cause strings to buzz.

myused_romance, would you explain a little more about this...

I can see how that might help if it is the tuning key buzzing and not the string, but can't get a picture in my head of where the tape might go :confused:


Ohhh,
I was thinking it was just your tuning keys, not the strings.
Nevermind that post then, lol.