Rotate the knob under "CH 1 Master" to adjust the overall volume of channel 1, which is on the left side of the crossover panel. Rotating the knob to the right will increase volume.
Rotate the knob under "Mono Sub" to adjust the volume of the subwoofer, if you are using one. Rotating the knob to the right will increase volume.
Push in the button labeled "Mute Low" if you want to silence the subwoofers.
Rotate the knob labeled "Delay" to increase or decrease the amount of delay on the subwoofer. Increasing delay adds an echo effect to the sound.
Rotate the knob to select a crossover frequency between the low and high frequency outputs. The crossover frequency allows for a smooth sound transition between the low and high frequency speakers, which have certain cutoff frequencies.
Rotate the knob labeled "High" to adjust the output of the high frequencies.
Repeat steps 1 to 6 for channel 2, which is on the right side of the crossover panel.