These are "Houses of Joy" AKA sound system speaker boxes. The speaker boxes behind the M90 are from 1970s-1980s Jamaican sound systems including one run by legendary dub reggae producer
King Tubby.
The speaker stack behind the 935 is from the
Dub Siren sound system based in Los Angeles. I erroneously stated that it is a 40,000 watt system; it is a 14,000 watt system which requires three separate circuits to run.
You can read more about sound system culture
here.
Go!
=ml=