Frequency response – as explained by Hi-Fi World

WHAT IT TELLS US

All frequencies within a music signal must be amplified equally, from lowest bass to the highest of treble, or tonal balance will be incorrect. The audio frequency range stretches from low frequencies at 20Hz (twenty cycles per second) up to 20kHz (twenty thousand cycles per second). All frequencies within this range should pass through an amplifier without change of amplitude.

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