Maxon VOP-9

Clean Booster/Overdrive designed specifically for tube amps Warm, smooth overdrive that doesn’t color your guitar tone Extremely responsive to fingering and picking touch Dual-purpose Drive control with Clean Blend function 9-volt or 18-volt regulated operation (switchable) Mechanical True Bypass Switching Used by Dave Weiner (Steve Vai Band, GIT Instructor), Doug Rappoport (Edgar Winter, Rick Derringer, Kim Simmonds GIT Instructor)