did a gig for a private party ($400 woohoo) and something happened on my guitar that ive never experienced. It was an outside party and temperatures were getting in the low 60's while we played. I have a fender $300 range acoustic, probably 15 years old. I fit it with a Fishinman humbucker and play through my hot rod deville. During the third song in the set, sugaree, my B string suddenly fell completely out of tune, just out of nowhere. It wasn't gradual at all. It fell so off that it sounded as though it had never been tuned up, as though i just put it on and never turned the tuning key. The same thing happened to the G in the next song. I tuned up again and in the middle of every song my B string would mysteriously fall off several steps. I used a different guitar for set 3 which did not have the same problem. Ive never had this happen before. btw I put 9's on it so i could bend and phrase like an electric, hate having a wound G.
Should I attribute the phenomenon to the cold weather? Could it be the tuning keys themselves? Was it not a good move putting 9's on it? It since has held tune just fine. I used it at an indoor gig just days prior and had no tuning problems whatsoever.
also how do i eliminate feedback from the low end with this kind of rigging?