This is the long awaited Ducky Filter that I've been working on for quite a while. Envelope filters make a wah sound that reacts to how hard the strings are struck. Lots of features on this thing to keep you busy for hours. Works great with distortion as well. This one has sensitivity, attack, and range knobs as well as a decay rate switch and a filter up/down switch. One LED is for on/off, the other is for input level. It's true bypass and has an AC adapter jack in the back. This is a limited production of 10, then a base model with fewer features will be released. Optional flame job or plain green paint
Ducky Envelope Filter page at FXDoctor's website...