Set all of the frequency setting levers about three quarters of the way from the bottom. This will help ensure that you have a good overall middle range.
Start with the lowest frequency setting on your equalizer; this will be around 60 Hertz. Start by setting this lever about half way down. Listen to the sound and decide if the bass frequency should be limited further. If you want less rumbling, lower the lever further. If you want more bass turn it up.
Continue to the highest frequency. Set the highest frequency in the middle and then increase the lever higher to create more highs, or lower the lever to remove more highs on the system. Most systems do well with this setting just slightly higher than the bass.
Adjust the second lowest frequency. This should be slightly higher than the lowest frequency setting. The second highest setting should be adjusted after the second lowest. The second highest should be slightly higher than the second lowest.
Position the middle lever just above the other four sliders. These levers affect the mid-range sounds.