I am using 6SN7's to make the amp less sensitive.
Are there any optimizations you would make, like changing the voltages, plate/cathode resistors, etc, assuming 6SN7s are used? I will be driving a PPP stage with this configuration. I have a plan on how I will find the optimum feedback.
![Image](http://img709.imageshack.us/img709/1974/testmld.png)