This is my clone of the Stone Deaf PF-2 Parametric Distortion FIlter. It is the successor to their PDF-1 which did not have the added distortion feature which, in my opinion, makes it even better. I bought the original pedal, and while I really loved it, I found it to be hard to control it's output level since it didn't have a volume control, So I added one to mine. I also found the orignal's enclosure very nice but kind of bulky so I built mine in a Hammond 1590BB2 (same size as a regular 1590B but a bit taller). Just like the original, along with the standard input and output jacks, it has a third 1/4" jack in the middle) where you can control the sweep of the filter with a proprietary Stone Deaf EP-1 expression pedal. Below is their owner's manual for it (click on the pic for a large image). I used all high grade Wima film capacitors in my version
