If you have a graphic equalizer and a subwoofer output, you may be wondering how to connect them. Most graphic equalizers have slide controls that divide the frequency range from 20 Hz to 20 kHz, or about the range of human hearing. Each control slide has a starting point at zero, and then you can slide it up or down to adjust the level of sound from low to high. Fortunately, hooking up a graphic equalizer to your stereo receiver is a simple process.

First, you need to find the wire from the equalizer. The wire should be a 12V power cable and should have the color of your receiver. Connect the equalizer's power cable to the receiver's power cable, then the equalizer's output to the subwoofer output. Make sure the wires are crimped to prevent any exposed metal from touching each other. Once the wires are properly routed to the subwoofer, you can mount your equalizer with a few screws. Remember to turn off your car before completing this process to avoid an electric shock.

When it comes to connecting your graphic equalizer to your receiver, you need to follow the instructions carefully. Most receivers have a preamp in and a preamp out port. You need to connect both the preamp in and output port of your amplifier. Once you've set the channels on your equalizer, you need to connect the left and right preamp ports to your receiver.