22. Deep Purple
Deep Purple could finish their concert 6 hours ago, and their beats could still continue to ring in your ears. This sheer loudness of the band music is what got them popular! In fact, they were included in the Guinness Book of World Records for becoming the loudest band worldwide for their concert at the London’s Rainbow theatre in 1972.
They are considered the pioneers of heavy metal music. Through the course of time, the gang made several variations to their style of music, setting them apart from conventional heavy metal bands.
