AMT ELECTRONICS FREAK GUITAR MATTIAS EKLUNDH CUSTOM SHOP. The ULTIMATE tube distoriton pedal! Like having a $2000 amp head in pedal form! AMT Custom Shop Signature model of Swedish guitarist Mattias "IA" Eklundh www.freakguitar.com. Mattias is one of the most unique, extraordinary, and talented guitar virtuosos of the contemporary music world. The new dual-tube Overdrive/Distortion in an originally designed AMT box with a 1.5mm stainless steel deck panel preventing tubes and controls from mechanical damage. This is truly a road worthy pedal! The semi-parametric MF equalizer is the major distinguishing feature of this device. Using TWO mid control knobs (MID and MID FREQ) you can not only increase or decrease MF levels but also chose the band pass central frequency. This will give you a chance to control your instrument's tone more flexibly not offered with other regular effects.