I agree, the SP9 MK111 WAS AUDIO RESEARCH'S BEST hybrid preamp with a phono stage.I never had a shootout between the MK111 and the SP9 with the ph3.Upgrade from sp9 to sp9mk111 is $995.00 including new tubes. the same price give or take for a used PH3 PLUS the extra set of quality inter connects.personally I would buy a used all tube design SP6 preamp. regards,RICH
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