SNAMM '15 - Mad Professor Evolution Orange Underdrive and Simble Predriver Demos Rich OsweilerAugust 5, 2015VideoThe Finnish company releases two new pedals—a preamp/distortion and an OD designed for cleaner tones.snamm-2015videospreampmad-professorgear-show-demooverdriveeffectsgearwhats-newGearEffectsVideosNAMMReviews