Figure 4.2. This graph has the vertical scale marked off from -18 dB at the bottom to 18 dB at the top. The frequency scale is from 10 Hz to 100 kHz. The bass portion closely matches the ideal bass curves shown and described in Figure 6.2. The maximum boost is at 15 dB at 10 Hz, half boost at 6 dB, flat at zero dB, half cut at -6 dB, and maximum cut at -15 dB.

The treble side is less than ideal. The max boost, max cut, and flat lines are as they should be. However the half boost and half cut fail to stay between the max and flat lines as the frequency comes down. The half boost line merges with the max boost line at about 5 kHz. The half cut merges with the max cut line at the same frequency. They remain merged until the frequency comes down to 1 kHz. At 100 kHz the max boost is 16.5 dB, half boost is 6 dB, flat is zero, half cut is -6 dB, and max cut is -16.5 dB. End verbal description.
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