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A high-quality effect designed by Bob Moog, the Moog Moogerfooger MF-103 pedal contains an amazing-sounding 6- or 12-stage phaser circuit as well as a wide-range LFO with an adjustable sweep function. Used with guitars, basses, keyboards, samples, or recorded tracks, the MF-103 can apply subtle tonal coloration or extremely deep phasing that spins your speakers and ears out of control. Uncontaminated by the digital world! A direct descendant of the original Moog modular synthesizers, yet can be used with any instrument level to line level signal. Sweep frequency, resonance, LFO rate, and LFO amount can be controlled by great-feeling knobs, expression pedals, or external control voltages. Panel switches select range of LFO rate and 6- or 12-stage phasing. 1/4" audio inputs and outputs, pedal/control inputs, LFO out, and auxiliary sweep input for bi-phase effects. Heavy-duty yet smooth-acting bypass switch for tabletop or floor use. A phaser is a type of comb filter, so called because its frequency response has several dips and peaks, like the teeth of a comb. As the phaser response sweeps back and forth across the frequency spectrum, the harmonics of the audio input signal are alternately increased and decreased. This produces the classic phaser "whooshing" sound.Phasing is one of the best ways to impart motion to a track and to make sounds come alive. You can get swirling, shimmering, vibrating effects; fill up a whole stage from one sound source; and create brand-new sonic textures.The MF-103's 2 comb-filter responses are called 6-stage and 12-stage, because of the number of phase-shifting circuits that are used internally. The 6-stage mode has 3 dips in its frequency response, while the 12-stage mode has 6 dips. These 2 modes have distinctly different sound qualities. In addition, the MF-103 features a variable feedback circuit which increases the resonance or depth of the phaser sound. Power supply included.Designed by Bob Moog6- or 12-stage phaser circuitWide-range LFO with adjustable sweepUse with instruments, samples, or recorded tracksDirect descendant of the original Moog modular synthesizersSweep frequency, resonance, LFO rate, and LFO control knobsPanel switches select range of LFO rate1/4" audio inputs and outputsPedal/control inputsLFO outAuxiliary sweep input for bi-phase effectsHeavy-duty, smooth-acting bypass switch for tabletop or floor usePower supply included