Have you ever wondered how an analog audio amplifier works? It is actually a kind of servo-controlled valve that easily helps in the regulation of stored up energy taken from the wall outlet. It is then measured in small amounts and transmitted to the loudspeakers.
The analog amplifier consists of two separate circuits, out of which one output circuit can generate powerful electrical output signal that depends on the incoming audio signal. Its AC signal is of 1 volt that can easily represent sounds that too of varying waveform. The weak AC signal can easily modulate a circuit that releases power which is stored by big capacitors and transformer in the amplifier’s power supply. The signal in amplifier’s input stage can be applied to transistors output circuit, and help to release power from the power supply towards loudspeakers.
It’s quite amazing to know that low-powered amplifiers can burn your speakers, the amplifiers of 200 or 400 watts per channel can put speakers at a greater risk. Its simple reason is that any small amplifier of power of 10 or 20 watts per channel is easily driven into distortion and also it leads to clipping with dynamic peaks in loudness. After clipping a signal is cut off and is changed into an almost pure DC signal, which leads to the damage of the fine wires. The benefit of using a large amplifier is that usually its output is clean and the power delivered to loudspeaker is without distortion and has free AC audio signals.
Tube amplifiers are generally preferred more as compared to the transistor amplifiers as they generate music in the even order of harmonic distortion which in turn creates a sort of warmth to the sound quality which is transmitted. There is a much difference in the technical functionality of tube amplifiers in comparison to transistor amplifiers as they easily provide a smooth or linear frequency response as when we push it near its output limits and tend to distort except the harshness associated with transistor clipping.
There is only one disadvantage of using tube amplifiers as they provide limited output power due to their tubes and also the output transformers.
Whereas the solid state amplifiers, tend to push their output limits and clip the audio waveform which produces harsh sound which is quite unpleasant to our ears. However the transistor amplifiers are very neutral and smooth and they do not have the complex impedance interactions that usually affect tube devices.