The Classical British rock tones of the 1970's, packed into one little box. 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 maintains a tight 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. The range of tone is controlled yet perfect for dialling-in the high-end response. The power clipping circuit is crafted from a modern low-noise OP-AMP and 2 red LEDs. It can create symmetrical clipping that distorts both halves of the signal keeping the sound smooth. True bypass circuits with a high quality TPDP mechanical foot-switch gives the bypass its phenomenal signal clarity. Specifications Controls: Tone, Level, Gain Power: Standard 9V DC Centre Negative Adaptor (Not Included) Dimensions: 94 x 51 x 53mm