Hello, I was just cobbling together an amplifier based on some ideas I had. For this amplifier design, I have decided on two stacked 150~185V or so each, regulated supplies. Probably going to build a pair of Maida regulators. Do my resistor values seem sane for such an amplifier? I've heard that the 6AS7 can pull grid current and still work very well, so this will be my first amplifier using source followers, in order to prevent loading down my low current splitter on transients, and possibly allowing a smidge more power. Also, for my mosfets, what devices would be good for this application? I've been thinking the DN2540, or IRF820. The way I have them biased seems reasonable, but I am open to suggestions. I know that the 6AS7 can be very mismatched, so I was considering making the FET biasing adjustable, but would like to know the best way to do it reliably. One last thing, would I be better off with the cathode resistors for the 6AS7's going to ground, or should I have them tied together into a current source going to the negative rail?