Congrats on the CA-906 preamp. Beast!
IMO the 2 chassis preamp with external power supply and two chokes is a great move. Tough to beat that external power supply weighing in at 35 lbs. Really lowers the noise performance.
Do you know what brand vacuum tubes (1 x 5Y3, 1 x 6SL7 and 2 x 6V6) incorporated with a newly design circuit ?
What about the line stage utilizing four military grade 6SN7 vacuum tube?
Surprised only RCA inputs.