ADCOMs are fine audio hardware. Congrats on the find BBM! I had considered upgrading to ADCOM or Carver equipment once out of college. But got sidetracked by the dreaded A/V home theater craze. Lot's of surround junk passed as hi fidelity.

Lot of the Massachusetts-based audio companies were brain child's of Henry Kloss. Quite a few spin offs as he sold each company and started a new one...KLH, Advent, Kloss Video, Acoustic Research, Atlantic Technologies, and lastly Cambridge Soundworks.
Let's not forget, Bose is headquartered in MA, Lexicon too, and others I'm forgetting.

As for C&V audio, I only managed to retain my pair of AR 94s and a Technics SL-1700 Mk2 (home model of the legendary 1200 disco mainstay). Most of my stuff had to be CL-ed off for my move.