An intuitive format that contains brutality and clarity at the same time is what the B3K delivers. A defined and powerful overdrive, with a simple layout, it sets no boundaries or rules to unleashing the desired tone. Specs BlendMixes the clean input signal with the overdriven signal. The clean signal remains at unity gain while the volume of the overdriven signal is set by the Level knob, allowing for fine control of the blend ratio. ToneControls the high frequency content of the sound. A variable low pass filter from 3kHz (ccw) to 8kHz (cw).LevelSets the volume of the overdriven signal.DriveSets the amount of saturation in the overdriven signal. GruntWhen engaged provides a massive low end boost to really thicken your sound.Mid BoostGives a subtle 6dB boost from 300 Hz to 1kHz to help you cut through a bit more.OutputConnect from the ¼” Output jack to the input of your amplifier or another effects pedal. InputConnect your instrument or output from your pedal board to the ¼” mono jack.9V DCOnly use a regulated 9V DC adapter with a center-negative plug.DimensionsWidth: 75 mm / 3″Length: 111 mm/ 4¼″Height: 43 mm / 1¾″Weight: 250 g / 0.55 lbWarningThe Microtubes B3K has a current draw of 20mA. Only use a regulated 9V DC adapter with a center-negative plug.Unregulated power supplies and/or higher voltages may result in suboptimal noise performance and even damage your unit, voiding the warranty.