IMHO it is a legend - no speaker I have known shared the same traits as a Rehdeko. A local distributor imported them in my country in the 90's and I owned the large RK175 and much later the smaller RK145 for a very short time with DartZeel ...
Rehdeko's were extremely colored - but with some types of music they could sound very real and natural. Single acoustic instruments could have life in our room, bass in jazz recordings was fascinating. But voices were colored, treble had little airiness and complex music could sound horrible. Some people who listened to them in Herve room hated them, particularly as they were very efficient and he listened very loud.
It was a bipolar speaker - some people were bewitched by its realism with some recordings and were able to forget all its problems, others simply hated it. No middle term. The type of equipment that obliges us to select recordings for them.
Today I regret having sold the RK 175s - but in the same way I regret having sold my ESL57. Most probably I would not spend a long time listening to them, but they were unique and a reference in the high-end.
See them at : https://sites.google.com/site/rehdeko/Home/game
BTW, I see them from time to time being advertised in Europe. But I have always resisted!