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. 

 

Snell closed 2010

 

Thresholds been gone for decades 

 

 

Dahlquest is  also gone

Yep

But that said I'll ack that there is a lot of new material on YouTube that is very low quality and clearly the result of no expertise but access to AI.  Make a quick buck.

I'll also note that Mark Levinson (as they note right up front) is a brand owned by Harmon (owned by Samsung).  I believe his next company was Madrigal Audio Labs; then he did Cello with tom Colangelo. So more truth.  Not sure what XMBw4 is thinking.