A real “blast from the past”, here’s an Electronic Industries M-60C, originally introduced in 1968, that is a part of the Audio Research Corporation archive. Original retail price for this 50W amplifier was $295!
The M-60 was a “single channel basic power amplifier of high quality construction for whatever high quality speech or music re-inforcement is needed. It uses premium quality components throughout.” “Over 50 years later we continue this tradition.”