I would not let anyone work on these treasures until contacting Genesis. I recently have acquired a set of used 6.1s and did a lot of research before selecting them and even more research since in order to first determine if the right channel bass amp or servo motor was D.O.A. (was not) and later to figure out what to do with them after figuring out that the low-pass and bass level controls really can be set so that one channel sounds golden and the other like a major malfunction in the same room at identical settings! Through all my research I got the impression that they have continued to offer support and upgrade paths for a lot of their earlier models. I have read several accounts of owners sending their electronics to their shop for testing and repairs and upgrades. My Genesis speakers are in that special class of components that I don't just own, but also have a responsibility to preserve them and to maintain them for future generations. Yours will sound even better when you get the hardware sorted out.