The S1-45 is equipped with lightweight Celestion neodymium speakers. Two channels and four foot switchable modes deliver spectacular clean tones, plus the amazing Super Crunch offers the biggest, crunchiest tones ever heard. The three-band EQ is augmented by the Infinite Shape Feature (ISF), which works with the EQ to provide infinite new tone-shaping control. The Master section provides Master Volume, Resonance, and Presence controls. Dynamic Power Reduction (DPR) reduces the power up to 90% with no loss in tone - excellent for studio and small venue gigs. Professional touches include a Series Effects Loop, Emulated Speaker output, and MIDI switching.