By the early 1970s, reggae had finally penetrated the mainstream and rattled around the world. In 1972, Jimmy Cliff starred in the movie "The Thick Path" and wrote a soundtrack for him, Bob Marley became a world superstar, and even Paul Simon did not miss this fashionable music, hiring Cliff's companionship to record his distinctly reggae-centric composition "Mother and Child Reunion". At the same time, a movement inspired by a deeper, more powerful, less commercial sound, the dub reggae (aka dub), was gaining strength in the British underground. The main structural element of this movement was the sound systems. A kind of battles of sound systems - soundclashes - became an attribute of many parties. DJs from competing sound systems competed with each other in sound extraction techniques and in the exclusivity of the records used, many of which were printed on vinyl in a single trial copy (the so-called dub plates) just hours before the party. In the interest of the strictest secre