They are late 80's models...but I purchased them recently new in the box. I examined the stylus, cantilever and housing and they are spotless.
There is some blog info out there about the 10A...but precious little on the 20C. The 10A retailed for about $ 390.00 and the 20C was around $ 550.00. They both have very dynamic sound reproduction qualities and I have the orginal spec sheets and independent test metrics. I am just not that knowledgeable about high versus low outputs and their interactions with the equipment I own. The Preamplfier has a MM/MC switch in the rear that is tied to a phono stage in the chassis so I am able to utilize the MC cartridge...but I don't have the paperwork any longer for the Pre so I can compare specs for it against the cartridge.
There is some blog info out there about the 10A...but precious little on the 20C. The 10A retailed for about $ 390.00 and the 20C was around $ 550.00. They both have very dynamic sound reproduction qualities and I have the orginal spec sheets and independent test metrics. I am just not that knowledgeable about high versus low outputs and their interactions with the equipment I own. The Preamplfier has a MM/MC switch in the rear that is tied to a phono stage in the chassis so I am able to utilize the MC cartridge...but I don't have the paperwork any longer for the Pre so I can compare specs for it against the cartridge.