My dad just got his. He runs 5 year old Klipschorns with current gen mcintosh tube preamp and mcinstosh 275 amplifier. He went in thinking he was probably going to return it, and that it wouldn't be a noticeable performance. He said it felt like a 20% improvement in sound quality. He is a photographer and said it felt like turning the vibrance up in a color photograph. He was a definite convert and now I might have to get one :/
