I am a former Audio Refinement owner. I did not use it with Magnepans. It does seem to sound more powerful than its 50 watt rating and it has deep and tight bass. It is well made and good looking. Why am I a former owner? Well, I bought it based on the reviews, which claim it sounds "tubelike". I sold it and went back to tubes. By shopping carefully, I picked up a hybrid (ss/tube) amp and hybrid preamp for $1,325, which is slightly more than a new ARC. The sound quality of this combo clearly beats the ARC in every parameter except deep bass. Only problem for you is that Magnapans tend to do better with high current amps. Not all tube amps will meet this criteria.
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