To get a sense of the dub aesthetic consider this rare track, date unknown (though it'd have to be from the 70s) ...
There's something really special about this version, King Tubby released 'Hijack the Barber' in 1974 that while lovely is more conventional, compared to this total elemental breakdown.
Listen especially from about 1 minute 50 where the echo becomes more pronounced and in the background you can hear a series of super-delicate sounds, tickling computer sounds that go nowhere (perhaps when listening to this you can see why those hip-hop instrumentals impressed me so much because they mine a similar territory).
Compare it then with the upbeat rendition from 1969 (some sources say 1970) by John Holt.
Tees then goes on to detail the later versions (including the King Tubby) that changed the title to 'barber' as a way for 'Dreads to express their anger at Barbers (Baba => Barber, neat huh?)'. He particularly appreciates the track by Dr Alimantado (gunshots included).