P, an insulting comment of that sort isn't helpful to the discussion. Tightly controlled double blind listening tests of the sort Alan described(with certainly eminent participants)have indicated that there is no necessary "tube sound" if the unit is correctly designed and operated within its designed limits. The frequency and/or distortion aberrations that would create a "warmth"("liquid" or dry)don't exist in units with high fidelity, regardless of the output device topology.

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Enjoy the music, not the equipment.