Check the listing for details. Darkglass Microtubes X Distortion Bass Effects Pedal. Condition: New. Listed at 259.99 USD. Distorting bass has always been a very challenging engineering endeavor. In order to achieve a punchy and aggressive distortion that is also full and fat sounding, you need to reconcile two contradicting conditions: The tightness comes from attenuating bass frequencies before saturation, which will also result in a very thin signal. But boosting the lows will result in additional, unwanted fuzz. The Darkglass Microtubes X distortion bass effects pedal is the company's solution to that problem in a very compact form: The signal is split by two variable low-pass and high-pass filters at the very, very beginning. The high-pass signal (mostly mids and treble) is distorted using CMOS circuitry, just like older Microtubes pedals.The low pass-signal (all bass) is left untouched.