Report NGD - Advanced Jumbo in Gibson Acoustic Posted September 12, 2012 Congrats and welcome to the AJ club As I've said before Aussie, the AJ is almost like having 2 guitars in one. Phospher bronze on a AJ makes them deep and mellow....actually similar to the D28s I've owned. I suspect that the ones you previously played had PB on them. 80/20s bring out a different animal, lots of " zing" I call it. It's amazing how sensitive the AJ is to different string types. I switch up from time to time depending on my mood. I like PB on it when I'm feeling some hank Williams and need a dark and dreary sound. When I want some hot bluegrass, it's 80/20s and the AJ cuts like a knife. I suspect with the new finger style interest you will want the 80/20s. Listening to the sound clip you posted that AJ has 80/20 on it so now you know what to string her with Enjoy!!!