Figure 2, frequency response of very good magnetic preamp. The precise values stated in the table below were obtained using the cursor readout provided in l t spice. This is a graph of frequency versus gain expressed in d b. The frequency is on the horizontal axis on a logarithmic scale. That is, the distance between 1 and 10 is the same as that between 10 and 100 and between 100 and 1 k etc. The frequency scale range is from 1 Hz to 100 kHz. Gain is plotted on a linear scale on the vertical axis. The range is from zero d b to 60 d b.

At 1 Hz the value is 58.4 d b.
At 2 Hz it is 58.3 d b.
At 5 Hz, 57.7 d b.
At 10 Hz, 56.9.
20 Hz, 54.6.
50, 48.8.
100, 43.4.
200, 38.2.
500, 33.2.
1 k, 31.1.
2 k, 28.8.
5 k, 23.3.
10 k, 17.8.
20 k, 12.2.
50 k, 5.4.
100 k, 2.0.

This completes the verbal description.
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