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I bought new D'Addario 12 gauge Strings got my Fender CD 100 Acoustic Guitar. The E,A,D Strings seem to be buzzing a lot. Is that normal for new strings?

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What was the gauge of the previous strings? –  ecline6 May 6 '13 at 13:20
    
I assume them they were 11s or 12s only .... not sure. they were the defaults you get with CD100 –  Aram Bhusal May 6 '13 at 15:08
    
Even though the difference in gauge between 11s and 12s is just .01 on the high E. On the low end the sets could vary as much as .05 to .08 This could be the cause of the buzz. Not only because of the different size, but the different tension of the strings. –  ecline6 May 6 '13 at 15:54
    
So is that normal? –  Aram Bhusal May 6 '13 at 15:59
    
Yes, but the guitar should be able to handle a small range of different gauges without dramatically altering the setup. My guess is you'll be able to fix the buzz with a small tweak to the action or truss rod. –  ecline6 May 6 '13 at 16:22
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1 Answer

Assuming that it has been tuned correctly, it is not normal. The old strings were probably 11s or maybe 12s, so there should be no problems if there weren't previously.Do they buzz open, on specific frets, maybe there is another problem with the guitar that has manifested itself when the strings were changed. Were they changed for a particular reason ? Like did one break, were they old, did you not like the sound/feel of the originals? More info. please. How old is the guitar, is it still under warranty ?

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YEs, They do buzz when open. They were changed as the strings were rusted. It is few months old but I am in India and not sure if the warranty is valid here ... –  Aram Bhusal May 6 '13 at 15:07
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As ecline6 says, action or truss rod. Look along the strings and see if the neck is fairly straight, with the distance between strings and neck roughly the same from bridge to nut. If there is a big difference, or the strings look closer near the middle, then loosen the truss rod by 1/4 turn, check and repeat until the buzz goes. It's a gentle operation that really should be done by someone who knows . If the bridge is too low, again it's a tricky mod, and needs an expert, unless the bridge is adjustable with 2 screws, which I doubt. –  Tim May 6 '13 at 17:27
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