Why I decided to design and build these headphone amplifiers. There are lots of reasons. First let me say that there are some things transistors do better than tubes, like low output impedance, which works better with low efficiency speakers like the Wilsons. Then there are things that tubes do better than transistors. Like high voltage.
Electrostatic headphones are very high-voltage devices.
The idea here was to design and build something good enough to make it into Stereophile's Class A category. With the re-organization of Stax, this system is no longer available. The amplifier in this system is an all tube DC-coupled unit. The sound is nowhere as good as the Omega, but strictly due to the amplifier used. The solid state drive amplifier is horrible.