Brands That Died

Dynaco Stereo 70

The Dynaco Stereo 70 is a vacuum tube power amplifier introduced in 1959 by Dynaco, designed by David Hafler. It was one of the most famous and widely used tube amplifiers ever made, selling over 350,000 units during its 17-year production run. Marketed primarily as a kit (Dynakit), it offered exceptional value and performance, becoming the gateway to tube audio for generations. The amplifier was available in both kit and factory-wired forms, with the assembled version priced at $130 at launch. 

@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.