an analog amplifier is a device used in car audio applications to produce louder and clearer sound. Amplifiers, aka amps, are most often found in the trunk of the car and require semi professional installation. It draws power from the battery of the car amp uses the signal input from the car's stereo as its two inputs. Its output is in the form of current aimed toward a receiving speaker. Again this is generally found in the trunk of a car to power a subwoofer.
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