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Can a computer power supply be converted for a set of speakers?

I'm trying to figure this out. I read about converting an ATX power supply, but I think there must be something I'm missing. Generally, PSUs are rated for something in excess of 300 watts, depending on the quality of the supply they can be rated for much much more. However, when reading about the conversion, the different outputs were in volts. How do I control the output wattage in order to make sure that I don't instantly blow out my speakers? Or is that even possible?

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lemonie7 years ago
The speaker out put is through an amp', it's that you need to ask questions about rather than the power supply to it. L
headinmysights (author)  lemonie7 years ago
I'm not sure you'll be able to answer this. I was hoping to put one massive woofer and send all low frequencies to it, and then put in two tweeters, hoping that it would somehow overcome the most likely overpowering bass. Is this a viable setup? Ideally, I plan on building these speakers for parties, where I just throw this in the car, drive there, and we're ready to go, don't need to deal with tiny crap speakers anymore. So, ideally, I want to create stereo sound on my tweeters, but just let it go for the woofer, since bass would obviously have no need for stereo. Would I need two crossovers, or just one? I plan on using these parts:

woofer: http://www.parts-express.com/pe/showdetl.cfm?Partnumber=290-340

tweeters: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-24635-1-ND

woofer amp: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-24635-1-ND

tweeter amp: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-18033-5-ND

So, with that in mind, I'd love your help.

orksecurity7 years ago
If you're worried that a 300 watt power supply might be too much for a 10 watt amplifier... Don't worry. That's "up to 300 watts" before the voltage regulator is no longer able to deliver the specified voltage (and either lets the voltage drop or burns out or both).
Using a stand-alone PSU is tricky because many require two switches to turn on or may need a certain load to work. I have found that some models are easier to use than others. You just have to collect them and test each of them for your application. ~Bob~
Power is measured in watts, so the higher the wattage of the power supply, the more electricity it can supply. On speakers, the power is also measured in watts, but it refers to the maximum power of the audio going into the speaker. If your speakers are powered with a built-in amplifier (has an audio input AND a power plug on them), you can supply the correct voltage to the power plug from the power supply. If your speakers are not powered speakers, and only have speaker wire as input, you must attach them to an amplifier. The computer power supply only provides direct current electricity, and won't send amplified audio to the speakers.
dilandou7 years ago