Miracle electronics devices pvt. Ltd. An iso 9001: 2000 certified company is offering audio line matching transformers. The company is the manufacturer of all types of toroidal transformers, ferrite core transformers ,laminated transformers, flat - ui transformers, smps and other voltage controlled devices. These audio line matching transformers are specially developed to suit the impedance of the loudspeakers to the maximum load of the tube or transistor. For that the impedance to the primary winding is equal to the load of the output stage active element. These audio line matching transformers come with following specifications: