Having heard, in person, Robben Ford play his Dumble during his sound check and subsequent concert, I can say a real Dumble sounds pretty good (or was it just Mr Ford making it sound good?), but a lot of amps sound good. From what I've read, the whole "Dumble thing" is more for the player, how the amp feels and responds to the player — something the audience will never experience (save any audience members who happen to have Dumble amps themselves).