I second a sincere thanks to the person who exerted the effort to create this wonderful tribute site. (Is it Manfredpersson?). There is nowhere, including Audio Research's own site, where you can get this information, and the pics of the cosmetics and interiors of the units. I was able to look at the internals of units that I have never seen, and this was so nice. Hopefully, some members here will provide some better photos of their units, where the creator was obviously unable to obtain first-rate photos.