25th Feb 2008

Amplifiers

Amplifiers are manufactured by many different companies all over the world. From guitar amplifiers to stereo amplifiers to little amplifiers you stick on your mobile, almost every electronics manufacturer makes an amplifier of some type. This guide will attempt to clear up some of the questions you may have about amplifiers, and what to look for when purchasing one for yourself.

How Amplifiers Work?

Amplifiers, although varying in types, all essentially work the same way and for the same purpose. The job of an amplifier is simple: to take an original signal and make it louder. Although people often just think that the amplifier simply takes the original sound and makes it louder, it is actually generating an entirely new sound. The amplifier will take a weak audio signal and reproduce it to make a signal loud enough to drive a speaker, which will then be released as the sound wave that we hear. This is why with different types of amplifiers the tone or sound of the original input can be altered, and also why putting more power into the amplifier will generate a louder pulse from the output.

The Input Circuit of an amplifier is the original signal that is comes in to the amplifier, which is then recorded in the amplifier and run through the system. It will apply resistance inside; at whatever degree the amplifier is currently set to, and will then recreate the same sound once again. Often, the original signal will not be strong enough to be amplified to the degree people want, so a pre-amp will be used. Pre-amplifiers use the same process as a normal amplifier, but to a lesser extent.

Higher quality amplifiers will first use a preamp to make the signal slightly stronger before taking the signal the rest of the way, which will improve the quality of the sound produced and remove most of the distortion.

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