The Xotic BB Preamp offers awide variety of sounds. It's capable of a 30dB+ clean boost with an adjustable +/-15dB two band active EQ which adds a wide range of harmonic content to your ideal sound. The BB also utilizes a pre-gain stage which allows the Pedal to go from a very pristine clean to a very smooth,compressed, overdriven sound. True bypass for eliminating any signal interference when switched off. Can be used with DC adapter (optional) or 9V Battery.