I have very bad sounding F#, G, and G# on the D string, frets 4,5, and 6... I believe they are wolf tones, the normal note fighting with the not perfectly tuned to G, sound board...Is you C10 (or C12) the same; very dead/thuddy notes there ? Same notes on the A string as well... frets 9,10, and 11...
And what, if anything, have you done about it ?
Thanks, M