Thx for the replies. I had Primaluna integrateds and PL separates years ago. PL uses 12AU7s in their preamps and integrateds. Reason I ask is I bought a used DeHaviland Ultravere with a 6sn7 pre and l loved the sound with my SS amp. I would like to hear a ss power, 6sn7 pre in a single chassis. I also have a hybrid intgegrated that does not use the 6s (uses 6922s and equivalents) and was curious if anyone made a SS integrated hybrid with the 6s. I know Musical Fidelity makes ss integrated with Nuvista tubes in the pre section and BAT makes their integrated with tubes in the power amp section. I have researched and not found (easily anyway) such a combination. Maybe what I am looking for is just not common.