Roy Mitchell-Cárdenas bounces between guitar and bass during Mutemath sets. Here is his main guitar—a Sublime Guitar Company Chieftain. The guitar itself is stock, but it did originally come with a Pelham blue finish (think Dave Grohl’s Trini Lopez model), but he wanted to give the instrument a different identity. Roy used artwork from Jean-Michel Basquiat to cover the top. Only one upgrade has been made: The headstock was repaired by a friend with super glue after the guitar fell off a stand.