Quote Originally Posted by Wales-Bales View Post
Not sure about Kyuss, but for QOTSA the bass amp is part of it, but his main trick is using a Maestro Parametric Filter MPF-1 that was designed by Bob Moog back in the 1970's, which he has since been replaced by a Stone Deaf PDF-1 pedal (which is an enhanced copy of the MPF-1).

He deffo plugged his Gibson into a bass amp when he was in KYUSS