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Message: <blockquote data-quote="skylineTT" data-source="post: 7290388" data-attributes="member: 576995">a computer power supply (PSU for Power Supply Unit) is the little fan cooled metal box inside of a computer that powers the computer. since computers hardware runs on DC power, the Power Supply is perfect for car audio. you can buy a PSU at any big electronics store or on newegg.com and get one that is at least 600w. you will tie all of the yellow (12v) wires together and all of the black (ground) wires together and a few other wires that will make the power supply turn on when you flip the switch.. from there you have a 12v power supply. for the head unit, you will tie the yellow and red wires together and tie them to the Yellow on the power supply. then put the black wire from the head unit with the black wires from the power supply. this will turn the head unit on when the power supply is on. the green, gray, white, and purple wires from the head unit are all speaker wires so those will power your speakers. the sub amp will also be wired up to the power supply. you will put the Yellow power supply wires into the 12v terminal on the amp, and the black ground wires from the power supply to the ground terminal on the amp.. then you will take a small piece of wire and connect it between the remote wire terminal and the 12v terminal. this will turn the amp on when the power supply is on. then connect your RCAs and youre set.When I do these builds, i use a headphone to RCA adaptor and run that to the input on the amp so that i can just run the whole system off of an MP3 player or phone. this eliminates the head unit all together and is really handy but then you need to power your speakers with a diff amp.</blockquote>

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