They were pioneers in writing their own Spanish-language songs, and they were also probably the only garage band anywhere to have been the most successful pop act in their country, as they were in 1965. Their anthem “Demolición” was one of the biggest radio hits of the year in Peru. They also had their own national TV programme during 1965. The band’s initial public exposure was orchestrated by Erwin’s younger brother, Harry, who arranged their introduction into popular radio and television media through his early contacts. It was on his recommendation to his brother, the lead singer, that he adopt his aggressive vocal “screaming” technique, which has become the trademark of the group’s notoriety, and made them the vanguard of punk expression.