13. New engineer for every album
Jimmy Page didn’t want anyone else to take credit for the sound of Zeppelin songs. So, he produced every record of the band himself and for each album he used to hire a new engineer.
14. Only one TV appearance
Led Zeppelin had made only one TV appearance which was in June 1969 for a French TV. This is because after taping for the French TV appearance, they realized that the audio video quality of TV is quite low and no matter how well they performed they would be at the mercy of the studio engineers.