Crispy - Headphone Amplifier with Good Sound - Headphones 8-600 Ohm

[lineup]

CRISPY
Transformer should be a small 12VAC.
Adjust R4 for 0.762V across R2.
There is no need for input RC filter.
Sound should be good and clean thanks to the JFET input.
Should fit headphones 8-600 Ohm without any changes.
THD 0.0004%