Please see this thread: http://www.classicspeakerpages.net/IP.Board/index.php?showtopic=7250&pid=92987&st=0entry92987'>http://www.classicsp...t=0 where we discuss the Mellotone acoustic material for early AR-3 (NOT 3a) and AR-1 speakers. I bought quite a bit, and have some left over. A piece 12" x 24" will cover one grille frame if applied like the original, with the material hanging over the long edge (the frame is 11 3/8" wide). If anyone is interested, I'll sell TWO 12" x 24" pie