![]() Inductively coupled circuits, like those in transformers, are configured so that a change in current through one circuit’s conductors induces a voltage across the ends of the other circuit’s conductor. This effectively couples the two circuits. Transformers are passive electromagnetic devices that transfer energy from one circuit to another by means of inductive coupling.īasically, each circuit has its own conductive wire that wraps around a common magnetic core. Still, they are both designed on the same principles. The power transformers that provide our buildings with regulated mains voltages deal with much higher voltages and currents than microphone output transformers. When we hear the term transformer, we often think of the power transformers that feed electricity to our buildings from power lines. In this article, we’ll discuss the role of the transformer in microphones as well as the microphones that use transformers and those that do not. They adjust voltage, current, and impedance. Mic transformers have two conductive coils (one for each circuit) wound around a common magnetic core. What is a microphone transformer? A mic transformer is a passive electrical device that physically isolates two circuits while maintaining an electrical relationship between the circuits. Some microphones even have transformers in the middle of their signal chains rather than at their outputs. Some microphones have transformer-coupled outputs, while others are deemed transformerless. ![]()
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