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a hi fi amplifier


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I know what is an amplifier, but what the meaning of HiFi

HiFi is short for "high fidelity". The output of a high fidelity amplifier is the same as its input: very low added harmonic and intermodulation distortion, a wide flat frequency response and very little added noise.
An audio expert said the perfect high fidelity amiplifier is "a piece of wire with gain".
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