I can't speak for all OTL's, but I'm currently using an Atma-sphere S-30, 30watts/ch stero amp driving Alon Lotus SE speakers. It replaces an Audio Reseach amp with a large increase in transparency, imaging and speed. This amp has a wonderful midrange which I preferred over the Cary SET's that I heard. Remember, not all SET's sound the same, Art Audio, Wavelength being more neutral than the Cary's. It really is a matter of personal taste. It is also important to audition the amp with the speakers you plan on using.
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