I know exactly what you mean. In 1976, I owned a pair of Klipschorns and borrowed my friends unmodded Fisher 400. Blown away may be an overused term, and nor very descriptive, but yes, I was. The sound was huge and very realistic, full of detail, color, and surprise...ease! I have toyed for years with the idea of buying another one, especially since I own another set of efficient Klipsch speakers now.
It isn't just a piece for nostalgia, it is a damn fine integrated amplifier for efficient to moderately efficient speakers, in this day or any other! Thanks for the reminder.