Petrucci has used Ernie Ball Music Man guitars since the early 1990s, and his signature models are among the most popular guitars in the world. His signature models include the John Petrucci Majesty, the John Petrucci BFR, and the John Petrucci JPX.
Ibanez
Petrucci also used Ibanez guitars in the 1980s and early 1990s. His most famous Ibanez guitar is the Ibanez RG550, which he used on Dream Theater's first two albums.
Fender Stratocaster
Petrucci has also used Fender Stratocaster guitars on occasion, particularly for clean and bluesy tones.