In January 1970 Lucian K. Truscott IV reviewing Led Zeppelin II for the Village Voice described the sound as "heavy" and made comparisons with Blue Cheer and Vanilla Fudge.
En xaneiro de 1970, Lucian K. Truscott na súa crítica de Led Zeppelin II para o xornal The Village Voice describiu o son como "heavy (pesado)" comparando o grupo con Blue Cheer e Vanilla Fudge.