Use the JC 120 model. That's what he used for cleans on this album. That as well as I read he also used a ZOOM 9002
This is from his wiki:
Studio albums
With Dream Theater
1989 Majesty/When Dream And Day Unite Randall RG100ES, Mesa Boogie Mark IIC+
1992 Images and Words Marshall JMP1 (for Metropolis Pt.1), Roland JC120, Zoom 9002 (for Clean Sound), Mesa Boogie Quad Preamp
1994 Awake Mesa Boogie Dual Rectifier, Mesa Boogie Mark IIC+ (Only album to be quadruple layered. 2 takes using Dual Rectifier, 2 takes using Mark IIC+)
1995 A Change Of Seasons Mesa Boogie Mark IIC+, Mesa Boogie Mark IV, Mesa Boogie TriAxis
1997 Falling Into Infinity Mesa Boogie Mark IIC+, Mesa Boogie Mark IIB, Mesa Boogie Mark IV, Mesa Boogie Dual Rectifier, Mesa Boogie TriAxis
1999 Metropolis Pt.2: Scenes From A Memory Mesa Boogie Mark IIC+, Mesa Boogie Mark IV, Mesa Boogie Dual Rectifier, Mesa Boogie TriAxis, Mesa Boogie Formula
2002 Six Degrees of Inner Turbulence Mesa Boogie Mark IIC+, Mesa Boogie Dual Rectifier (for The Glass Prison and The Great Debate)
2003 Train Of Thought Mesa Boogie Road King Series I
2005 Octavarium Mesa Boogie Lone Star (for Clean Sound only), Mesa Boogie Road King Series I, Mesa Boogie Mark IV
2007 Systematic Chaos Mesa Boogie Lone Star (for Clean Sound only), Mesa Boogie Mark IV, Mesa Boogie Dual Rectifier (for Forsaken)
2009 Black Clouds & Silver Linings Mesa Boogie Lone Star (for Clean Sound only), Mesa Boogie Mark IV, Mesa Boogie Mark IIC+, Mesa Boogie Mark V (for The Count of Tuscany only)
2011 A Dramatic Turn Of Events Mesa Boogie Mark V
2013 Dream Theater Mesa Boogie Mark V, Mesa Boogie Mark IIC+, Mesa Boogie TriAxis (for Clean Sound and some solo sounds), Mesa Boogie 2:90, Mesa Boogie Royal Atlantic RA-100 (for The Looking Glass)
Solo Album
2005 Suspended Animation Mesa Boogie Roadking Series 1, Mesa Boogie Mark IIC+
With Liquid Tension Experiment
1998 Liquid Tension Experiment Mesa Boogie TriAxis, Mesa Boogie 2:90 power amp
1999 Liquid Tension Experiment 2 Mesa Boogie Mark IIC+, Mesa Boogie Mark IV
With Jordan Rudess
2000 An Evening with John Petrucci and Jordan Rudess Mesa Boogie Mark IV
Sent from my iPad using Forum Runner