"Though Petrucci gets many of his effects from his Fractal Audio Axe-FX II, he does use a handful of stompboxes that are often changing. When we caught up with Dream Theater during their fall 2011 tour, he was using a Keeley-modded Tube Screamer, Boss PS-2 Phase Shifter, MXR EVH117 Flanger, and a G Lab BC1 Boosting Compressor, powered by a Voodoo Lab Pedal Power 2 Plus. On the floor, Petrucci uses an Ernie Ball 25K Stereo Volume Pedal an Axess Electronics switcher to control his stompboxes and Axe-FX II, and a wah pedal that controls a rackmount Cry Baby. He finishes things up with a Boss TU-2 Chromatic Tuner. "