Small correction of my previous post - tube SE OTL is of course possible without output coupling capacitor, but then we talk about specific design that is irrelevant to this thread.

Greetings to all music and headphones lovers! My name is Drazen, I am owner of HAD Audiolab company and constructor of Maestral series tube headamps. I felt it necessary to get involved in this forum to correct some inaccuracies and to offer answers to your questions directly. OTL Single end...