Hello everyone, I am a new member from Australia and am extremely excited to find this site. I have owned a pair of AR 3a improved since new (bought about 1978) and they are still performing beautifully though I have not tested the electrics. I can find minimal information regarding specifics about the drivers and electrics ( crossovers etc) The Ar 3a improved seem to have been built in a narrow window between the late AR 3a's and the early AR11's. The speaker cabinet cosmetics are obviously dif