One of the disturbing findings I had was that using it after I had cleaned records with the Walker Prelude and vacuumed it with the Delrin tubed VPI record cleaner. It was improved greatly. Also doing the reverse, greatly improved the sound???
Thanks, Tbg. If I'm understanding what you describe (which maybe I'm not) a second cleaning gave an improvement, and in so doing neither technology w/ attendant fluids distinguished itself?
That suggests a third type of test. Clean side A once with VPI followed by Audio Desk (the order doesn't matter), then clean side B twice with either one.
Maybe your post already answers this :) - have you found the greatest benefit of the Audio Desk to be how clean it gets a record versus some other method, or its convenience?