How old are your speakers

My ads L400's are almost 40 years old.  I also have a pair of diy Rega Kytes which are 80's vintage as well.  Hmmm, so is my Tandberg 3012, Creek CAS3140, Kyocera 811 cassette deck but my Thorens TD125 mkII is from the 70's

Vandersteen 2Cs. I am the second owner. They are in 8/10 condition. They sound wonderful. Based on the serial numbers, Richard Vandersteen guessed they were built around 1979.

In order of purchase (all still owned).

Infinity 2000 - 1970 (bought new)
Chartwell/BBC LS35/As - 1981? (bought new)
B&W Matrix 801 S3 - 1991 (bought used in 1997)
infinity RS1 - 1982? (bought used in 2017)

I have two pairs of AR 3s that I bought at a swap meet about 10 years ago. The outside of the speakers was still in good shape but the crossovers and a coupl3 of bass drivers needed help.
  I became friends with a fellow that works with  Vintage AR and he helped me bring them up to now they sound wonderful.
accirding to the serial numbers, they were made in the middle fifties.
 In the past I have owned B&W 801s and Duntech Princess speakers.
 I am a retired musician and have played in several Symphony Orchestras and I think that the ARs sound the way music should sound.
Carter