 All of this quickly gained the Who a reputation for being "the loudest band on the planet"; they reached 126 decibels at a 1976 concert in London, listed in the Guinness Book of World Records as the loudest rock concert in history.The band had a strong influence at the time on their contemporaries' choice of equipment, with Cream and the Jimi Hendrix Experience both following suit.Although they pioneered and directly contributed to the development of the "classic" Marshall sound (at this point their equipment was being built or tweaked to their personal specifications), they only used Marshall equipment for a few years.