Amp schematics are abstract diagrams of amplifiers, showing the parts making up the device as simple, geometric symbols connected by lines and arrows. "Amp" is short for "amplifier," an electrical component that increase the amplitude of a wave or signal.
Schematics are frequently used by electrical engineers, because they simplify the complex structures of electrical devices into easily understood graphic plans. Amp schematics show at a glance the inner structure of an amplifier and how its parts work together as a whole. Amplifiers are very common electrical components and are used to amplify, or increase the output, of a variety of signals. They are especially used for audio frequency signals, to increase the loudness of sound waves.