You can buy a computer power supply from an electronics store or online. Check the specifications on your car amplifier to see if it requires a different voltage or amperage input. Power supplies usually cost around $60 USD, but they tend to be more expensive if they output higher amperage and voltage.
The PS-ON wire controls the power supply and allows it to stay on when it’s plugged in. The COM wires may also be labeled “GND” or “Ground. ” If the power supply doesn’t list the colors in a table, you may see a pinout diagram of colored boxes with labels next to them. The color inside each box is the color of the corresponding wire on the connector.
There will be multiple COM wires attached to the connector. You can use whichever one you want for powering the car amp.
You can buy 18-gauge wire from your local hardware or electronics store.
You can also cut the wires and wrap the exposed ends around one another to splice them. Put a wire cap over the splice so they ends aren’t exposed. You won’t be able to use the power supply for a computer in the future. Wrap electrical tape around the wire and end of the connector if you’re worried about it falling out.
If the fan still doesn’t work after checking the wires, then the power supply may be faulty.
Usually, the 12 V+ wire is yellow or red, but it may vary depending on your power supply. You can choose any 4-pin peripheral connector to use for your amplifier. Tug on the cords lightly to make sure they connect directly back to the power supply since some wires attach to other peripherals.
If you don’t have wire strippers, you can also slice the insulation off with a utility knife.
Cut the COM wires from 2 other 4-pin peripherals and secure them in the ground port if you plan on using the amplifier for more than 30 minutes at a time.
The amplifier will not start if you don’t connect power to the remote port. You can also use another COM wire if you want, but you will need to cut it off of another peripheral connector.
You can attach multiple speakers to the amplifier, but the power supply may not provide enough electricity for them to work to their full potential.
If the amplifier doesn’t turn on, check your wire connections to make sure they’re plugged in properly. If it still doesn’t work, then the amp or power supply may be faulty.
