An apparatus for transforming alternating electrical energy supplied by alternating electrical energy supply means to appliances using alternating electrical energy through electrical transformation means operatively interposed between and electromagnetically coupled to said alternating electrical energy supply means and to said appliances using alternating electrical energy, said electrical transformer means being of the two-stage type and comprising a first electrical transformer assembly and a second electrical transformer assembly, at least one permanent magnet being associated with said first electrical transformer assembly and positioned with respect to said first electrical transformer assembly in such a way that, when said alternating electrical energy supply means are switched on, the permanent magnetic field produced by said at least one permanent magnet is added to and amplifies the alternating electromagnetic field produced by said electrical transformer means, thereby amplifying the electrical energy transferred to said second transformer assembly and therefore to said appliances using alternating electrical energy.