Having visited a cutomer who effectively had two systems a 'vintage' system comprising Krell, Audio Research SP10 , Goldmund reference turntable, and a more modern Chord/Nagra , the sound of the vintage one was a bit too soft and fuzzy , was the Audio Research SP10 ever the pinnacle of pre-amps>or was it just marketing bull even back then? have the older products deteriorated over time or are newer products simply much better? Keith.