Stevie Young replaced, because Young bore a physical resemblance (at the time) to him. Malcolm overcame his drinking problem and returned to the band, staying until his retirement in 2014. In July 2014, AC/DC's Brian Johnson confirmed that Young had recorded with the band for their upcoming album "Rock or Bust", again replacing his ill uncle Malcolm. In September it was confirmed that Young would replace Malcolm on a permanent basis. It was revealed in a "Rolling Stone" interview that Young had been recruited by Angus as far back as January 2014, before contact had been made with other band members. Young
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