had a model rs or rg 1 (as i recall, with a beautiful laquer front) in the late 1980's that i bought from primus audio in kc, mo, and used with a tube pre. very very nice ss amp. neutral, powerful...what good ss should be. drove huge frieds and duntechs like it owned them. only thing that has ever rivaled that amp for those qualities is my current accuphase.