A mid-’70s hard-rock anthem built on a chanted hook and stop-start riffing, “High Voltage” became an early AC/DC signature—first issued as a single in Australia, then folded into T.N.T. and the band’s 1976 international debut. It hit No.10 on Australia’s Kent chart and later entered the UK Singles Chart (No.48, 1980); live, the bridge evolved into a crowd call-and-response spotlight for Bon Scott (and later Brian Johnson).