Features: Input Jack: plug guitar into this, or cable coming from the “out” of another effect. Output Jack: plug cable going to amp into this, or cable going to “input” of another effect. Intensity Knob: controls the amount of effect (chorus and Vibrato) by increasing (clockwise) or decreasing (counter-clockwise) the brilliance of the light source circuitry. For faster speeds, reduce the Intensity a bit. Volume Knob: affects the overall volume of the pedal...but only when the pedal is turned "on." Speed Knob: this sets the rate of the modulation, and will be reflected visually by the flashing LED. I gave the MDV an over-sized knob so that you can adjust the speed on-the-fly using your feet. Speed/Status LED: This bright LED not only tells you when the effect is On, but also pulses at the selected speed so you can visually sync to the desired tempo. Chorus/Vibrato switch: When this switch is set to Vibrato you get out of tune pitch-bend vibrato with no phasing. When this switch is set to Chorus you get the familiar Hendrix/Trower phasing sounds that we all grew up with. Modern/Vintage switch: Set this switch to Vintage for stock warm “Vintage Univibe” sounds of a darker nature, or set it to Modern for more output and brightness...great for use with less distorted tones! You may only use a 9 volt adapter having the Industry standard 2.1mm x 5.5mm sized barrel connector configured Center Negative. The universal symbol for “Center Negative” (99% of pedals sold use this) is the following symbol: If you use a pedalboard Power supply, make sure to use one that is “Regulated” and has “Isolated outputs” (for example: the Voodoo Labs PedalPower2) so that exactly 9.0 volts DC is supplied. If you use a non-regulated 9VDC power supply, the MDV-2’s bulb will either be brighter or dimmer than is recommended and will not perform correctly. Warning! Do not use any voltage other than 9VDC. The MDV-2 has circuitry that converts the 9 volts up to 18 volts inside the pedal, using other than 9VDC will damage or destroy the MDV, and may cause a fire! Light Source Trimmer control: Warning! This trimmer allows you to fine-tune the amount of current that gets to the light bulb thus adjusting the amount of pitch-bend Vibrato and Phasing.This is set at our shop and should not need adjustment but (if need be) should only be adjusted by someone who understands the nature of the circuit and how the Lightbulb affects the overall sound. The Trimmer is accessible through a hole located on the bottom of your MDV. Use a small slotted or Phillips-head screw driver to turn the Trimmer slightly Counter Clock-Wise (CCW) to INCREASE bulb brightness, increasing the “Phase Swoosh.” Or Turn slightly CW to DECREASE bulb brightness and “Phase Swoosh.” You have to use your ears, but our optimal setting is marked around the access hole should you want to return to the factory setting.
