Precision Fidelity C2 tube preamp. I had a C7 back in The Days of Yore - $500! The phono stage to beat then was the new PS III from Paul & Stan. The C7 sounded so much better I traded in the PS III. The C7 was a tube phono stage (cascode circuit), no high-level stage and a selector switch/pair of 5Kohm pots on the front panel. The C8 added a transistor high-level stage.