John Petrucci Names Only Song From Latest Album Using 7-String Guitar, Talks 'Metallica-ish' Section | Music News @ Ultimate-Guitar.Com
Ernie Ball Music Man John Petrucci Majesty 7-string - Dark Roast M1169 — HIENDGUITAR
DREAM THEATER Guitarist JOHN PETRUCCI Performs "Awaken The Master" On New Ernie Ball Music Man Signature Majesty 8-String (Video) - BraveWords
John Petrucci May Use 8-String Guitar on the New Dream Theater Album; Ernie Ball Stock Rises 1,000,000% | MetalSucks
Dream Theater - JP's Secret Weapon | Facebook
Biography - John Petrucci
Yes, of course : r/Dreamtheater
Hear John Petrucci play his new Ernie Ball 8-string Majesty for the first time on Dream Theater's none-more-prog new single, Awaken the Master | Guitar World