Procedure
The GX Series has a unique, built-in crossover feature. By using the channel 1 input and flipping the Crossover switch to the crossover position, the amplifier outputs a lower than 100Hz frequency band that is useful for subwoofers on channel 1. This switch position also outputs the rest of the frequency band on channel 2, which is useful for top box or mid-high pack speakers.
Note
This is done without a 'Y' cable and is only for a mono signal. If stereo is required, a second amplifier is needed.