Audio Research SP-3


Does anyone have any documentation on an AR SP-3. This is the 1972-1975 preamp that has had a few follow-on models associated with it. Tried all of the traditional sites and there is data on the 3A, 3A-1 ect. Any help would be greatly appreciated. Thanks.
umaguma

Showing 1 response by cleeds

You might want to look on the ARC website.