Class A amplifiers use transistors to amplify the incoming signal and require a base voltage of 0.7 volts. Let’s start with the first letter of the alphabet. The position of this label may vary depending on your device, so make sure to have a good look around! Class A – A real bundle of energy Note: If you’re unsure what type of power amplifier you have, you can simply check the label on the amplifier to find out. However, these don’t play a part when it comes to a stereo system, so for the purposes of this blog be left out. There are other types of power amplifier classes such as C, E F, G and H. If you set up a hi-fi system you would need to use a Class A, Class AB or Class D. The different class of power amplifiers says nothing about the quality of sound but instead refers to how they are pieced together.
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