Get the Sound of an Open-back Cabinet Get big guitar tones with the Friedman Amplification Dirty Shirley 112 open-back guitar speaker cabinet. This ruggedly built cab has a smooth open-back sound and an airy sonic signature. The Dirty Shirley 112 cabinet is loaded with a single Celestion G12H Redback speaker. You get the classic British sound of the Redback in a compact, open-back cabinet. Take it from the Sweetwater crew — the Friedman Amplification Dirty Shirley 112 guitar speaker cabinet will give your rig the boost it needs.Friedman Amplification Dirty Shirley 112 Features: Open-back cabinet offers detailed, airy bass and mid response Rugged tongue and groove Baltic birch construction can handle heavy touring Old-school looks with vintage-style grille cloth Handles up to 150W of power Celestion G12H Redback speaker offers punch and tight low end