I have a thirty year old Threshold 400A amp and a twenty year old Threshold T2 preamp that have been upgraded with new caps, transistors and binding posts and given their age still sound wonderful. Over the years I have gone through several sets of speakers, CD players, DAC's and cables but have hung on to the Thresholds.
20 Year Old Amplifiers compared to 2017
Just a random thought, but I’m curious just how well the state of the art solid-state amplifiers from 20 years ago compare to some of today’s better offerings. For example, what does a pair of Mark Levinson 33Hs or a Krell FPB 600 sound like if compared to the latest offerings from Pass Labs or Ayre Acoustics?