Check the listing for details. NUX Brownie Distortion Effects Pedal. Condition: New. Listed at 49.00 USD. The NUX Brownie delivers classic British rock tones of the 1970s packed into one little box. By using a hybrid of circuits, NUX created truly unique pre-amp and power tube distortion characteristics. You’ll be amazed to hear the warm, organic tone that’s reproduced. Brownie has a specially designed BJT input stage causing it to “break-up” when the preamp tube starts to distort. It also has an asymmetrical clipping circuit letting you simulate some of the characteristics of an actual tube amplifier. It also keeps the bottom-end tight by processing bass frequencies which can get muddy when distorted. NUX Brownie uses a low-pass tone control filter to simulate the Variac effect (by lowering the voltage going into the amplifier) for rounding-off your tone.