I used to own one of Frank's Dyna 120s. What a little sleeper that was. I really enjoyed taking it over to "certain" audiophiles homes and asking them to hook it up to get their "opinion." Boy, did that little amp turn smirks into faces of disbelief in a big hurry. Here this little Dyna amp just KILLED their mega-buck Wizzer while I just sat there with an innocent look on my face and asked ... well, what do you think? *lol* It was kind of like beating their Corvette in a drag race with my little VW ... except they didn't know I had a Ferrari engine under the hood. I've always had a lot of respect for Frank's work and have heard a lot of his products. His tube preamp is a killer too.