I have the Harman Kardon Citation XX and the X-II Preamp. I'm the 2nd owner. It was a gift From Sidney Harmon to The North American Sales Manager from whom I acquired them from. I thought it was hype but after hooking them up I realized this was a keeper. I cannot find any material on it anywhere as to how many were made and in fact had never seen one till the day I fell into it.
