Adjust the first frequency band, which can equalize from 18 Hz to 450 Hz. Select the "shelf" or "peak-dip curve" option. The shelf mode will cut or boost all of the frequencies below the one selected; the peak-dip curve will cut or boost a small range around the frequency selected. Turn the gain knob to boost or cut the selected frequency range as much as 32 decibels.
Fine-tune the second frequency band, which can equalize from 35Hz to 450 Hz or from 350 Hz to 4.5 KHz with the "x10" button engaged. This frequency band has a fixed "peak-dip curve" mode. Adjust the "Q" of this frequency band anywhere from 0.3 to 3. A low "Q" setting will result in a wide frequency band for equalization; a high "Q" setting will result in a narrow frequency band. Adjust the gain knob to boost or cut the selected frequency range as much as 16 decibels.
Modify the third frequency band, which can equalize frequencies from 160 Hz to 2 KHz or 1.6 KHz to 20 KHz with the "x10" button engaged. This frequency band also has a fixed "peak-dip curve" equalization mode. Adjust the "Q" of this frequency band anywhere from 0.3 to 3 to adjust the width of the equalization band. Turn the gain knob to boost or cut the selected frequency range as much as 16 decibels.
Adjust the fourth frequency band, which can equalize from 1.5 KHz to 25 KHz. Choose the "shelf" or "peak-dip curve" option. The shelf mode will cut or boost all of the frequencies above the one selected; the peak-dip curve will cut or boost a small range of frequencies around the frequency selected. Turn the gain knob to boost or cut the selected frequency range as much as 26 decibels.