Amptweaker’s FatMetal Pro has the same boost features and multiple effects loops as the company’s TightMetal Pro, but voiced like its FatMetal. It has a Gain Boost, Volume Boost, Tight control, and a proprietary SideTrak effects loop that is engaged with the Boost footswitch for A/B to clean effects or another distortion pedal. Other features include a three-band EQ along with switches for Smooth, Fat, and Thrash. Amptweaker pedals use true-bypass switching and operate on nine to 18 volts. Learn more at amptweaker.com.