Symphony X is an American progressive metal band from Middletown, New Jersey. Founded in 1994, the band consists of guitarist Michael Romeo, keyboardist Michael Pinnella, drummer Jason Rullo, lead vocalist Russell Allen and bassist Michael LePond.

They achieved some commercial success with the 2007 album Paradise Lost and the 2011 album Iconoclast, which reached number 76 on the Billboard 200.

The albums The Divine Wings of Tragedy and V: The New Mythology Suite were partially recorded in The Dungeon, Romeo's home studio. The Odyssey, Paradise Lost, Iconoclast and Underworld were fully recorded there and produced by Romeo himself.