Clearly the mighty Manley 300B preamp, father of all high-end headphone amps since 1996, when you were all living in the stone age "headamp-wise".

Stick in a pair of EAT 300B and hear what the Gods of music have to tell you. You guys made me laugh with your "balanced" hype especially when the genesis of some of these amps is just customer asking for more. Ask a manufacturer to sell you two times the electronics necessary...what he gonna do? Show me the specs and the signal path of these "killer" monsters...please.
You can't beat single ended direct heated triode amplification, you can't, and while i like better push-pull for my speakers, this is just because of power needs.
Headphones represent a perfect load for DHT. Simplicity at it's best. Shorter signal path possible...blah...blah...
