AC/DC list of members that were part of the band before 1975, see List of AC/DC band members. AC/DC AC/DC are an Australian rock band formed in Sydney in 1973 by brothers Malcolm and Angus Young. Their music has been described by music journalists as hard rock, blues rock, and, controversially, heavy metal; the group have defined themselves as "a rock and roll band, nothing more, nothing less". AC/DC underwent several line-up changes before releasing their first album, "High Voltage", in 1975. Membership subsequently stabilised until Cliff Williams replaced Mark Evans as bassist in 1977 for the album "Powerage". In February
Angus Young he would begin using in 1977, was also used as a compressor and a booster in his signal to "fatten up" his tone. Ever since adding it to his rig, it was used on several albums in the studio for chosen rhythm guitar tracks and all lead guitar tracks. Beginning with "Rock or Bust", due to the discontinuation of the Schaffer system, Young began using a replica of the unit's preamp with a commercial wireless unit. Contrary to popular belief, Angus and Malcolm have both stated in guitar enthusiast magazine interviews that very little pre-gain, if any, is used on