What is Audio Researches best preamp period


Tube or solid state from the oldest to the newest ref ser ,what is the best one they made or make.
bbaxley2
This may cause some controversy,yet to be honest let me explain.I have owned the SP-8,SP-10,SP-11,and the SP-15.I had the SP-15 upgraded(literally rebuilt)by Great Northern Sound,and BY far IT IS THE BEST OF THE LOT.BEST FREQ EXTREMES,OF THE LOT,AS WELL AS BEST SENSE OF QUIET.LOW MAINTENANCE,DUE TO 3 TUBES IN PHONO(TUBE ROLLING IS EFFECTIVE HERE).There is NO sense of whiteness,claimed by some,though the mod cost bucks.I t has incredible inner detail,and a huge soundstage, and most important to me--Correct timbres.I have compared it to a CJ ART,as well as the Lamm and it was a dead heat,except for the A.R. having more bass slam.What can I say.Sometimes it pays to keep,and modify existing stuff.

Best regards.
My friend, I asked you to email me outside of the thread. Our little reparte' was deviating from the originator's topic. I'd be more than glad to discuss my experiences with you. Relax.