| http://www.w3.org/ns/prov#value | - an amplifier is an electrical circuit that takes an alternating current (AC) as input signal and usually increases the amplitude/voltage of the AC signal.??? amplifiers are used for MANY applications, but the type of amplifier we will be focusing on is a guitar amplifier.??? this is important to note mainly because:-there are many principles of amplifiers that are important for an electrical engin
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