The AC30 in the 11R is amazing! I'm jamming over a blues style backing track I put together. I feel really sloppy like I haven't played blues in a long time, but yeah - it is what it is. Staying fresh with improvising is not easy. And I get a little lost in the changes from time to time. Oh well, I'm loving the 11R. I really like the response from the 11 Rack. It is so much fun to play.