Up for sale are a set of near-mint, legendary 500W tube amps…the Audio Research REF 600’s mk i (concurrent serial numbers, as seen in pictures)
I can say with confidence, that these are almost like museum pieces.
What can you say about the Reference 600 that hasn't already been said? It's ARC founder William Zane Johnson's masterpiece, his magnum opus. Described by The Absolute Sound as one of the 10 "most significant amplifiers" ever, a "lifetime achievement product" offering "breathtaking thermionic power that has no peer." These amplifiers are the last word in power, resolution and fidelity, musicality, and power.
Boasting 16 6550 power tubes PER CHANNEL and all-tube input and regulation, these things are behemoths--what Robert Harley called "a serious amplifier in every sense of the word." He continued: "But High End audio in its purest expression has never been about sacrificing sound quality to convenience or cost.