I've been using an ARC LS7 that I bought used back in 1998(!) and it has consistently been an absolute champ. I have turned it off a handful of times in that period, and never changed a tube. what a demon!
What’s the most underrated used Audio Research gear?
Sure, everyone loves the SP-8, SP-10, etc., but what about the sleeper ARC gear that’s still a good deal used? Recently got a used SP-17 and love everything about it for the price, but it got no love from either the press or the boards.