Original vintage ad for ACOUSTIC RESEARCH INC.  AR-1, AR-3 suspension loudspeakers, reviews by John H. Newitt, H.H. Fantel, Robert Gorman.  The speakers shown may be hard at AR's permanent display, the AR Music Room on the west balcony of Grand Central Terminal, New York City, NY.  
Main office was located at 24 Thorndike Street, Cambridge, MA.
This unique old one page 1960 high fidelity stereo component trade magazine advertisement would display beautifully matted and framed.  It would make a nice accompaniment to your vintage stereo.