http://proguitarshop.com/do... Welcome back to ProGuitarShop and ToneReport.com. Today we're digging deeper into the Carcosa, this time looking at the splattier side. The Carcosa has two controls for biasing its transistors, and together they can yield some extremely textural results. The Before and After knobs bias the transistors in different parts of the circuit, with the Before knob focusing on the front of the pedal and the After knob in the back. By turning these knobs, you stack the transistor biases. Keeping both knobs past noon biases the circuit twice, making for some supremely splatty fuzz tones. Ultimately, the After control has the most control over the raspiness. Everything from slight compression to vice-crushed square wave fuzz is possible and the Demhe and Hali modes allow you to match this versatile fuzz to your rig.