<https://www.head-case.org/forums/topic/10783-megatron-electrostatic-headphone-amplifier/page/34/#comment-820834>
<http://schema.org/text>
"I'm not sure if I understand your reply. In the Megatron the first stage uses 12AU7, and the second stage uses 12AX7. What do you mean by \"provide 24db gain to drive pair 12au7s\"?\n "
<https://www.head-case.org/forums/topic/10783-megatron-electrostatic-headphone-amplifier/page/34/?tab=comments>