The Sewer Bæby… MY Sewer Bæby. This was one of my first pedal modification projects and it still remains one of the favorite effects I own. What happens when you take a salvaged, humble Dunlop Crybaby GCB-95 Wah and mod it? Falling into the rabbit hole of pedal geekery is one thing. Having a wah custom to your tastes is second. I’ve already written about how I added true-bypass and a much needed power indicating LED to this little guy. Next, I got into the guts and made it a kick ass bass wah: my fucking BABY.
The wah circuit is quite simple in terms of the quantity of parts. It’s a very interesting circuit, though, as it’s application wasn’t even intended by the inventors. It was supposed to be a mid-boost, but instead acted as a variable band-pass filter that simulated the human voice. If you’re interested in the intricacies of it, there’s no better article than The Technology of Wah Pedals over at Geofex.com. Alternatively, you can do just as I did: dive in based on a bunch of photos and descriptions of sound to shape up the tone of your wah.