The Wild Burro Audio Labs Betsy 8″ driver is a favorite among open-baffle enthusiasts for its high sensitivity, smooth midrange, and budget-friendly musicality. However, like many wide-range drivers featuring a center dust cap or lightweight cone geometry, its stock configuration leaves room for acoustical refinement. Designing and 3D printing custom phase plugs for the Betsy is one of the most effective modifications to unlock its full potential.