-designed and made in U.S.A.-, modern solid-state circuitry, simple screw-in replacement of original transistor circuit... see more-designed and made in U.S.A.-, modern solid-state circuitry, simple screw-in replacement of original transistor circuit board inside amplifier box
-O.E.M. replacement made in Mexico-, (40 amp with "T" shaped mounting bracket)-O.E.M. replacement made in Mexico-, (40 amp with "T" shaped mounting bracket)