https://www.vice.com/en_us/article/...-grateful-deads-amps-to-listen-to-soviet-subs
Above is a link about it...
Fun read, thanks! It gets very strange around defense and defense contractors. Remember the Army's (I think successful) scheme to get Noriega to come out of his "bunker?" They played R&R at intense levels until he caved. I should see if there are any pics of the gear they used. We could ID it!
The gear JBL sold the gov through the defense contractor was for the boat's PA, so designed into the structure which wasn't a one off proposition. I don't know how they ran speaker level on the boats, what they used for amplification, 70V or low impedance, how many zones they had, etc. etc. All I knew was that they were buying the most expensive 8" full range speaker in the catalog by the hundreds. And that it was for new sub construction. It was an excellent driver by the way.
But your article is much more interesting, far more exotic application and more entertaining.
In the interests of kicking this theme until it is dead, I met Susan Wickersham at Alembic's surprisingly rustic headquarters in Sonoma maybe 40 years ago. It was a uniquely casual place at the time ( as factories go) and I'd guess it still is. That was a fun time in audio even for a plebe like me. Things were starting to change and the pace was picking up.