@kerrybh 

"AI can be useful if its used as a starting point and even then should be taken with a big grain of salt."

You can't even take it with a small grain of salt but that won't stop people from relying on it when its convenient for them!

Acoustic Research AR, was the speaker to have in the 1960’s. I’m still listening to a pair of AR 2ax gems. 

Whatever happened to Boston Acoustics? They were really popular in the 80s/early 90s.

I worked for Tweeter, Etc., a specialty audio chain started in Boston in the early 70s. They were early to pick up on Yamaha, Nakamichi, B&O, ADS, Boston Acoustics.  Their patented system combo was an RX2, BX-1, a CR-620, and a pair of ADS L500s or if possible L710s.  You could do a lot worse at Tech HiFi where they force fed Phillips GA212, TEAC cassette deck, a Nikko receiver, and Ohm Es. 
or Bs on their customers. 
What happened to ADS and Boston?  Both brands were acquired by corporate entities who wanted something they had…ADS by Directed Electronics for their car audio, Boston by D&M for what?  Like Cambridge Soundworks was bought by Creative Labs for their computer speakers. 

In the early 80’s I had a Spectro Acoustic system the turner and pre amp were very good.