These analog plug-in modules are an assortment of fully analog fuzz modules for the Jackson Audio FUZZ pedal. These are faithful recreations of multiple historic and sought-after fuzz circuits, replacing the FUZZ’ stock MODERN FUZZ module with the legendary sound of fuzzes through the ages. Dead simple to install, you simply unscrew the FUZZ’ backplate, remove the stock fuzz module and replace it with any of the analog fuzz plug-ins. Voila! Your new fuzz pedal with all its features is accessible ready!