a hi fi amplifier

[walid1]

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

 

[audioguru2]

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".