The new moving-coil speaker system was installed in New York's Warners Theatre at the end of July and its patent submission, for what Western Electric called the No. 555 Receiver, was filed on August 4, just two days before the premiere of Don Juan.
Det nya högtalarsystemet installerades i New Yorks Warners Theatre i slutet av juli och dess patentansökan, vilken Western Electric kallade No. 555 Reciever, lämnades in den 4 augusti, bara två dagar innan premiären av Don Juan.