Pass Labs XP-20 or Audio Research Ref 3?

Bo,
This Pass amplifier has been modified to a .5 version if you read Alan's system description.
Regards,

Bo,
I think your style of communication irks some people but I believe that your passion and interest are sincere. Your audio tastes are very different from mine but many roads lead to Rome(which is the beauty of this hobby). I wish you success with your new endeavors.
Charles,