Audio Amplifier SpecificationsPre-Amplifier Specifications• Zi ≥ 1Mega Ω, Z0 ≤ 5KΩ• Av ≥ 100 (40dB)• Frequency Response: 40 Hz—50 KHz (≤ 1 dB drop)• Input/Output S/N ≤ 80 dB (f ≥ 20 Hz)

To answer the question, let's break down the given specifications step by step:

1. Zi ≥ 1Mega Ω, Z0 ≤ 5KΩ: This specification refers to the input impedance (Zi) and output impedance (Z0) of the pre-amplifier. The input impedance should be equal to or greater than 1 Megaohm (Ω), while the output impedance should be equal to or less than 5 kilohms (KΩ).

2. Av ≥ 100 (40dB): This specification indicates the minimum voltage gain (Av) required for the audio amplifier. It should be equal to or greater than 100, which is equivalent to 40 decibels (dB).

3. Frequency Response: 40 Hz—50 KHz (≤ 1 dB drop): The frequency response of the audio amplifier should range from 40 Hertz (Hz) to 50 kilohertz (KHz). Additionally, the drop in response should be less than or equal to 1 decibel (dB) across this frequency range.

4. Input/Output S/N ≤ 80 dB (f ≥ 20 Hz): This specification refers to the signal-to-noise ratio (S/N) of the pre-amplifier. The S/N ratio for both the input and output signals should be equal to or less than 80 decibels (dB), with a frequency (f) greater than or equal to 20 Hz.

By following these specifications, you can ensure the proper functioning of the audio amplifier and pre-amplifier.