I usually use bronze-wound 12s on my acoustic guitars. I always found that 11s sounded a bit "thin" and 13s felt too hard and tight. After trying these Spectrum Bronze 11s several years ago I now use them on most of my acoustics. They have a softer feel than other brands of strings I have tested over the years. These Thomastik-Infeld SB111 strings have the fuller sound of 12s but they feel less tight and hard. I can drop them down a semitone and they still sound full and rounded without being clanky whether I am fingerpicking or strumming. I still like the tighter harder feel of other brand bronze 12s on only two of my smaller bodied acoustic guitars, but I use these SB111 strings exclusively on ALL my dreadnought sized acoustics and will not use any other strings on them now. I think they keep their tone a bit longer than most other quality brand of uncoated bronze strings I have used. The only very minor issue I have had is that the short section of string at the ball end of the 5th and 6th strings, where the string is folded back and bound, is quite thick in comparison to other sets of 11s with the same diameters. On guitars with smaller diameter bridge pin holes it can be quite difficult getting the string seated properly and those bridge pins will not go in as far as the others.
