I have an AS MA 2.2 and compared a ML Ref 32 all-time classic with the MP-1 MkII and the combination of the AS amp and preamp just blew the ML 32 away. The synergy is incredible between AS components. The sound was just more effortless, natural, with greater depth and transparency. The ML 32 is a master of detail, but with the AS preamp the sound was just more, well musical and engaging. Buy the MP-1.
