Hello, I just piked up a pair today; found your post while looking for info myself; have you learned anything about them yet? I will let you know what I discover.
These are the best speakers KLH every made. They were made in 1980,1981. There are 3 modals in the series -- KLH1,KLH2 and KLH3. It is my understanding the drivers were custom made by Peerless for KLH. I own 2 pairs of the KLH1's, and one pair of the KLH2's. These speakers are very rare, they show up every once in a while on audiogon and eBay and they are usually dirt cheap. I always a jump at the chance to buy them. They are suberb. And they work fine wihtout the computer. More info _http://www.classicspeakerpages.net/library/klh/klh-1_series_klh-1_klh-2_kl/klh-1_series_feedback.html