Original vintage ad for ACOUSTIC RESEARCH INC. Main office was located at 24 Thorndike Street, Cambridge, MA. Announces AR-2a Speaker System, a ten-inch acoustic suspension woofer with a newly improved cone, and two five-inch cone tweeters in combination with our 1 3/8-inch dome-type super-tweeter. We invite you to hear this and other models of AR speakers at the AR Music Room, our permanent display on the west balcony of New York's Grand Central Terminal. This unique old one page 1960 high fidelity stereo equipment component trade magazine advertisement would display beautifully matted and framed.  It would make a nice accompaniment to your vintage stereo.