The Bigfoot Engineering Trouble Booster is inspired by the guitar sounds of Billy F. Gibbons (ZZ Top). The ideal partner for solid state or valve amplifiers, it excels both as a front end boost for creating early breakup, or as a standalone overdrive pedal. This is the perfect way to pack your tone full of harmonics. The Trouble Booster features two distinct sounds. The Bright setting provides an incredibly touch sensitive boost with plenty of sustain that will take you all the way to screaming lead tones. It has a tight bass response, superb presence, bite, and clarity, and will increase the guitarÄôs interaction with the amplifier like never before. The Normal setting is extremely versatile as a result of its perfectly rounded frequency response. In addition to having plenty of sparkle and grit, it will compress a little more thanks to the extended bass response, yielding a warm, fat saturation laden with vintage charm. Powered by a 9vDC adapter (not included) or 9v PP3 battery.