There is only one knob and it controls the overall output. Just plug in and rock. 

The CB Fuzz can accept any good quality 9vDC adapter for use with audio circuits that is filtered and regulated with a center-negative tipped plug.

It's one of the quintessential foundations of rock music. You know it, you love it, you've played them, but for as simple as these circuits tend to be, there's a lot more Zen-like balance between fuzz boxes than most other pedals. Small changes yield big results and much effort has been expended to crack the code and figure out the perfect combination of component values and types. Our Fuzz does just that, giving you an even-keeled amp-shredding experience that's easy to dial in and play.