Thanks Andy_l for your comments. And yes, that was an awesome broadcast on December 24, 1968---I was in my freshman year at NYU Engineering school in the Bronx. I never missed any NASA event, especially since I first started with the Mercury launches earlier in the 60s and even now as I visit many NASA locations. (I am hoping to see an SLS launch soon in person)
Best wishes for the holiday season----more neat articles are coming on EDN and Planet Analog regarding NASA activities and the book I am writing about the Apollo program and the Lunar Module.
The primary difference between the speakers I designed and the micro- and mini-speakers that Eminence makes is that the diaphragm is connected directly to the voice coil as opposed to an Aluminum or cardboard 'former' to which the voice coil was connected