LebGeeks

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#1 September 3 2005

rolf
Member

Power a car amp with a PC power supply

You can use a PC power supply for several things. They are also good to power car amps, if you have a car amp that you want to use at home.
Now the main problem is: how do I turn it on without a motherboard?

I must warn you first:
Since the power supply is expecting certain sensing circuit feedback to regulate the output voltage, manually starting it without attaching it to the motherboard could cause damage to the power supply.
It can get damaged in a way that it will not be able to power a PC, but still give you 12v power, or it can stop functionning altogether, but I think this is pretty rare.

Now how to do it: Easy, all you need to do is connect the green pin with any black pin on the motherboard connector, and it will go on.

These power supplies are good to run a car amp since they will give a pretty constant voltage. But you'll most probably need to wire 2 or more power supplies in parallel to have enough amperage for the car amp (that is if your amp is as big as mine,  :lol: )

Here's to help you find the green pin:
http://www.quepublishing.com/content/im … 3fig08.jpg

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#2 September 4 2005

mahdoum
Member

Re: Power a car amp with a PC power supply

interesting interesting  I like it, it's so geeky lol

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#3 January 5 2006

gogo
Member

Re: Power a car amp with a PC power supply

3an jadd its cool  nice nice lol

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#4 January 6 2006

karim soubra
Member

Re: Power a car amp with a PC power supply

the diagram is for an old atx motheboard/cpu
most new motherbard have 24 pin some even have an 8-pin eps12v

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#5 July 25 2007

karim
Member

Re: Power a car amp with a PC power supply

I doubt u'll be able to decently power up my audio amp with a PSU...

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#6 July 26 2007

rolf
Member

Re: Power a car amp with a PC power supply

karim wrote:

I doubt u'll be able to decently power up my audio amp with a PSU...

why not? you can, say, run 2 500 w power supplies in parallel...

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#7 July 26 2007

karim
Member

Re: Power a car amp with a PC power supply

well yeah... in parallel...  I said with a (read one) PSU...

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