I found this thought interesting... Cheap autotransformers are available with various combinations of taps for $15 to $40. Is there a possibility of one of those serving in a circuit like this? With autotransformers you can basically use any of the taps as primary or secondary to get the impedance you're after. Of all the industrial autoformers available there is a pretty wide range of voltages, what are the chances of hitting on the right impedance match for a parafeed with any tube? not just the one shown here.
Espressivo Headphone Amplifier
Espressivo Headphone Amplifier
Sure. You can also use cheap line transformers.
I am about ready to build a headphone amp with the visaton TR 84
I am about ready to build a headphone amp with the visaton TR 84