Figure 2. Close up of the Heathkit's controls. This photograph shows one channel of the equalizer's slide pot controls. There are only 5 bands. Each slider control is labeled with a frequency range as follows. The first, lowest frequency, on the left is labeled 30 to 125. The next is 125 to 500. Next is 500 to 2000. Next is 2000 to 8000. Next is 8000 to 32000. All of these are in Hertz. There is also a vertical scale for the slide controls as follows. Zero at the center. Going up from the center zero the labels are 3,6,9,12. Going down from center zero they are 3, 6,9,12. You might think that going down from zero the numbers should be preceded by a minus sign. So would I but they are not. End of verbal description. Go back.