When I mic my speaker cab for practice session recording the recorded sound is thinner and Tinnier than it sounds live in the room. I use an SM57a midway between the center and edge of the speaker and within 1" of the grille. When I recently played a gig, the sound guy (i don't know what mic he used) said that my mic'd sound through his PA was a bit Tinny, yet my stage tone was just right. Anyone else experience this?