What's the oldest piece of gear in your system?

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me
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Although the components are not currently being used, I still have the first system I purchased back in 1973. The set up includes a Sansui 8 receiver, a Teac A-640 cassette tape deck, a Technics SL-1301 turntable and Epicure Twenty Plus speakers. I suspect they have resided in 17 different apartments, condos and houses since being purchased in 1973.

1965 ElectroVoice 12-TRX's in 1959 Aristocrat cabs. They still sing sweet as ever, as the day I purchased them in '65. Although I do have a late 1920's - 1930's Lafayette 2 channel (Globe 45's) amp with matching field coil speakers that I listen to from time to time for music of that period.

The oldest piece of gear in my possession is a pair of Scott "bookshelf" speakers that were purchased by my father in 1967. The "bookshelf" designation was always questionable in my eyes because they are very heavy and have such prodigious low frequency output that I would expect them to propel themselves off of most of the bookshelves that I have seen. I also have a Nakamichi 600 cassette deck from the mid 70s, a Syrinx PU-2 tonearm from the early 80s, and one of the original VPI HW16 record cleaners, all of which work quite well.

Citation 16 power amp in beautiful condition. I don't use it any longer, but can't bear to part with it. Bought it new in 1977. It drove some JBL subs for a long time. One of the best woofer amps ever made.