I just had a new cab made from "The Cab Guy" in Indiana. Was looking for something different and wanted a cab to match the size of my "new to me" JVM 205H. John Came through with flying colors. Read really good things about the new Celestion 15" Fullback. Johan Segeborn bragged it up and said it was one the best new Celestions since the original greenback. Watched a lot of videos on it and wanted to give it a try. It's definitely got some low end balls. Real pretty cleans and does not get flabby. I was going to do a 2x15 but I think this will be fine. So far really impressed with the speaker and the quality of the cab. Currently running it closed back. I think I'm going to leave it that way.