I don't know the Audio Research amp you're refering to but can comment on the AA amplifiers. I've owned the Capitole 50 and found it very resolving. Smooth, open and true to the front end components. I currently have the AA Prestige monoblocks and have yet to hear an amp that exceeds the overall balance of this set of tube amps. My experience is limited of course by the others I've tried, but you will definitely will not be disappointed with anything AA manufactures. They make arguably some of the best cd players in the past 7 or 8 years and their amplifiers although less well known are wonderful. If the monoblock Prestige (no longer made) ever show up on the Gon, snap them up.
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