"Over the last 50 years, only a handful of innovations have truly revolutionized the sound of the electric guitar. The wah-wah is
one of them. It radically transformed the instrument's voice in a slew of genres, and Del Casher stood at the pedal's ground zero.
Combine that claim to fame with the astonishing fact that Del held the guitar chair for both Lawrence Welk's and Frank Zappa's bands,
and we find in his work a fascinating contribution to the pantheon of American music."
(John W. Troutman, Curator of American Music, Smithsonian Institution, Washington, D.C.) (L.A. Weekly, January 13, 2017, p. 34).
