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The XO Micro Metal Muff, from Electro-Harmonix, transposes everything great about the original Metal Muff into a conveniently-compact chassis with intuitive front panel controls. Additionally, a 15dB boost and cut organized around a customized mid frequency affords ample scoop possibilities, complete with selectable top boost ranges. All of this and more makes the XO Micro Metal Muff a convenient means of adding a little punishing, face-melting brutality to one’s signal.