Characteristics of HI-FI amplifier:
1. Signal to noise ratio should be better than 50dB.
2. Frequency response should be flat within +-1dB.
3. Nonlinear distortion should not be more than 1%.
4. The system should possess dynamic range of at least 8dB.
5. Stereophonic effect should be provided.
6. Environmental conditions should be such as to eliminate the external noise in listening room.