This story about Jamaican dub music mentions equipment from the 60's like the Fisher Spacexpander, Roland Space-Echo and Maestro Echoplex. Also some photos of gigantic speaker setups (bass is apparently an essential part of dub music.) I am not a musician, but some here are, as well as some who just like old electronics stuff. Closest thing I was aware of was recording studios that used speakers and microphones in a basement or attic as an echo chamber.
https://www.vox.com/2019/8/20/20811907/sicko-mode-weirdest-moments-jamaican- dub
-- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com