Jim James (My Morning Jacket)
Sam Beam (Iron & Wine)
ZZ Top
Kerry King (Slayer)
Scott Ian (Anthrax)
Rick Rubin
Legendario productor musical.
Shavo Odadjian (System of a Down)
Chris Adler (Lamb of God)
Zakk Wylde (Black Label Society)
Claudio Sanchez (Coheed and Cambria)
Fuente: Ultimate Guitar