I owned an used Arc ref 5 se for a few months before upping it to the a brand new ref 6. Big difference in sound. Wondering how much better will the ref 6se sound compares to the 6. I am kinda disappointed Arc came out with a ref 6se so soon. It makes me think that these are not Ref preamps if they upgrade so often. Don’t make sense. It almost makes me think as soon as a new Ref model comes out they are working on another new Ref model to replace the last one. And it’s only about money.