I recently got my vintage polk surrond system back after 4 years. I lost it in a divorce, but managed to recover it. The problem is, my center speaker (CS150) doesn't work. I tried to find a polk service center in the Los angeles area and couldn't. I would like to get it fixed. But in the mean time I purchased a new CSI30. I don't think it is compatable though. It is too overpowering, even when I lower the center volume. Does anybody know where to get service for my old speaker? Could anybody tell me what speaker would be compatable for a replacement?