Vintage Audio Research Dual 75A Tube Stereo Amplifier (Dual 51, D75, D76 Family)
For sale is an Audio Research Dual 75A factory upgraded from a Dual 51 Chassis. This upgrade must have been done back in the 70s as the tubes are all US made, not USSR/Russia like in most ARC gear. The cost of these tubes alone would be likely half the total cost of the amplifier if you were to replace them.
Tags: amplifier, audio, dual, family, research, stereo, tube, vintage