Funny no one really answered the question. I owned Rogers LS3/5A new in 1979, new in 1983, new in 1986,ser# approx 35000, 15 ohms was the best. When they went to 11 ohms with the big change in the crossover,the "MAGIC" was gone. It just did not do it with the same degree of "you are there" as the 15 ohm versions. Of this I am sure
