The Ravers, also known as The Tonics, were a German band that played commercial pop for their fans. However, they occasionally recorded heavy psychedelic rock under the name The Ravers with the help of other famous rockers. The album 'Bad, Bad World (Ravers Going Underground)' is a great example of their heavy psychedelic sound, featuring a driving Hammond, fuzz guitars, and cool musicians. The album includes 12 tracks, and it is believed that Achim Reichel was involved in its creation. The Ravers' music was not widely known, but those who knew about it quickly bought their records. The band members enjoyed making extra income and having fun while doing it.