This rock band, formed in Australia in the early 1970s by two Scottish-born brothers, became one of the most influential and recognizable acts in hard rock history. Their music is built on simple but powerful riffs, driving rhythms, and raw, high-energy vocals. Often labeled as hard rock or blues rock, their sound has always stayed close to its roots: loud guitars, straightforward song structures, and memorable choruses designed to be shouted along with in stadiums and arenas.The group’s early years were marked by relentless touring and a growing reputation for explosive live shows. On stage, they combined tight musicianship with a sense of danger and fun. One of the guitar-playing brothers became famous for performing in a schoolboy uniform, duckwalking and sprinting across the stage while delivering sharp, biting solos. Their lead singer in the 1970s brought a rough, whiskey-soaked voice and a mischievous, rebellious charm that suited the band’s lyrics about nightlife, mischief, and rock-and-roll excess.Their albums from the late 1970s defined their style. Crunchy guitar tones, pounding drums, and a thick, bass-heavy sound created a template that many later bands tried to copy. Songs were often built around a single unforgettable riff, repeated with slight variations and supported by a rhythm section that never lost the groove. Even when the lyrics were humorous or provocative, the band’s commitment to tight performance made the music feel serious and powerful.A major turning point came with the sudden death of their original singer in 1980. Many thought the band might not survive such a loss. Instead, they recruited a new vocalist with a piercing, raspy high register and immediately recorded one of the best-selling rock albums of all time. That record, packed with anthems and built to fill huge venues, pushed them from rising stars to global icons.Throughout the 1980s and 1990s, they remained a dominant presence in rock. Trends shifted around them—from punk to glam metal to grunge—but they stayed largely unchanged. No synthesizers, no fashionable haircuts, no obvious attempts to chase radio fads. They trusted in guitar, bass, drums, and voice, and fans responded to that authenticity. Their shows grew larger, featuring towering stacks of amplifiers, elaborate stage props, and crowds of tens of thousands singing every word.The band’s visual identity has always been as strong as their sound. Their logo, featuring a lightning bolt between the initials, became a symbol worn on shirts, jackets, and patches worldwide. It suggested electricity, danger, and raw power—the same qualities people heard in the music. Generations of guitarists learned their first rock riffs from these songs, and many professional musicians cite them as a primary influence on their own style and career.Despite changes in popular music and the aging of its members, the band has continued to release albums and tour well into the twenty-first century. Lineup changes, health problems, and even legal issues have challenged them, but they repeatedly return to the same core formula: hard-hitting, blues-inflected rock that emphasizes feel over complexity. Their legacy is not just a catalog of classic tracks, but an entire approach to rock music—uncompromising, loud, and honest.