Electro Harmonix Sovtek Deluxe Big Muff Pi Effects PedalThe circa 1991 Sovtek Civil War Big Muff (dubbed that because of its blue and gray chassis) used the same circuit as the Tall Font Green Russian Big Muff and the EHX Green Russian Big Muff. The new Electro Harmonix Sovtek Deluxe Big Muff Pi expands on that big, wooly sound with the addition of the Deluxe Big Muffs advanced controls while paying homage to the Civil War Big Muff aesthetic. Its all here in one integrated pedal. The Sovtek signature