WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
Hey
I too have problems with sub bass roll of. Changing the parrallel resistor at output from 47K to 1M fix the problem.
I use chokes from "Old stock audio" Portland, and 5MB OIP to output.
My amplifier load is about 10Kohm....