FWIW, I have used a McIntosh preamp for years, many years, and was as happy as I could be with it. Last weekend, I hooked up a tube preamp that I bought here on Audiogon about a year ago. What a difference! I doubt that I will be going back to the McIntosh. I think the difference is simply the tubes versus solid state. I also bought a McIntosh 275 Mk VI. I'm looking forward to working that into the system soon.