ACOUSTIC RESEARCH AR-1 SPEAKERS RARE. They are working but will properly need service to the crossover/control. They sound fantastic to me one of the best sounding speakers I’ve personally heard in my career. They show signs of wear from use but present very well for their age. I did not want to disturb them in their untouched found state. These are incredible pieces of audio history and hopefully they end up in an amazing permanent collection. Pro packaged, insured and includes tracking.