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The vibration of the signal-string is converted into a change in the magnetic field, which in turn is converted into an electrical signal for amplification. Since the pickup can accurately pick up the frequency, amplitude and weak high harmonic of the string vibration and convert it into an electric signal, and then amplify it by the amplifier, it is finally expanded by the speaker of the speaker, and the volume is not only increased. And more pleasing to the ear.
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