Audio - Amplifiers

Audio circuits have been among the first practical electronics designs, created to communicate and transmit sound over long distances and with higher fidelity. These circuits range from simple amplifiers to complex devices for capturing, processing, and reproducing audio signals. Today, the category encompasses not only audio amplifiers but also preamplifiers, mixers, equalizers, VU meters, audio filters, and other circuits that manipulate or enhance sound.

Power RMS (Root Mean Square) represents the effective power of an audio signal, reflecting the average quadratic value of the waveform. Power PMPO (Peak Momentary Output) indicates the maximum instantaneous output level that a device can deliver for a short period.

An audio amplifier is a type of audio circuit that amplifies frequency signals in the range of 20 Hz to 20 kHz. The input signal may be only a few microwatts, while the output can range from a few watts to several hundred or even thousands of watts, depending on the design.

Beyond amplifiers, audio circuits include mixers, preamplifiers, audio filters, and LED or VU display circuits, all contributing to sound processing, enhancement, and monitoring in both professional and hobbyist applications.