As there is not much happening on the cost no object " all out assault" tapedeck development .
A reference 2 track machine from the past
https://www.youtube.com/watch?v=HuJ9yNFVIFM
here a gearslutz link incl a few Tim de paravicini. posts
Yesterday I had the pleasure of listening to a few tapes (including Tapeproject 10) played through a Telefunken M15A and a Doshi tape preamplfier. The sound was very good, but the complete absence of subjective noise really impressed me - much far better than my Bottlehead Eros. Nothing I should not expect - the four Telefunken ECC801s used in the preamplifier cost more than the Eros head preamplifier.