Nice as SET's are, they are always a bit different, specially in the high frequency Area... I own OTL's from Atma-Sphere, and in my opinion, that's the Real Thing (or very close to it). They combine the best from all worlds, Body, a High Frequency Range to die for and a holographic speed which has to be heard to believe.
But, you need a matching speaker to get the best out of it ( 8 ohms+).
But, you need a matching speaker to get the best out of it ( 8 ohms+).