How Audio Transformers Work - Ningbo Wanji Electronics Science & Technology Co., Ltd.

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How Audio Transformers Work

Audio transformers are specially-designed for audio circuits. They block radio-frequency interference. They also block the DC components of an audio signal. They also split or combine audio components. Audio transformers are also used for impedance matching. Impedance is resistance. An example of impedance matching between high and low impedance audio components is the impedance matching between a high impedance amplifier and a low impedance loudspeaker. Telephone systems and professional audio systems use audio transformers.

Audio transformers work by aiding an AC input signal to produce another AC output signal. To achieve this, the audio transformers have two windings–the primary winding and the secondary winding. Windings are two or more coils of insulated wire wound around a magnetic metal core. The primary winding is the input and the secondary winding provides the output. When the primary winding gives a signal, it creates a magnetic field. The magnetic field starts fluctuating with the audio signal. The fluctuating magnetic field produces current. The current reaches the output or secondary winding and the signal is sent out of the audio transformers.

One purpose of audio transformers is to increase and decrease voltage in an audio circuit. The other purpose is to convert the circuit from an unbalanced to a balanced circuit. Audio transformers are also used to block DC current and to isolate one audio device from another.

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