Car Subwoofer - Powered by PSU

02ryan48

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Nov 5, 2013
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I've gotten a psu and jumped it, i then tested the connections using a voltmeter and the resulting volt was 11.97 however it stopped working and after restarting it it only gives out 1v, what has happened?

Pictures of the subwoofer setup at the minute, however it does not currently work properly as the power supply i'm using does not output enough amps
11udtlj.jpg

v4xjco.jpg

icsn0n.jpg
 

02ryan48

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The psu in question will be used to power my subwoofer but it's only giving out 1v and it needs to be 12v
 

02ryan48

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Ahhh i understand your confusion now, the subwoofer is intended for use in a car and i intend to make use of it in my room, sorry for not clarifying that
 

mbarnes86

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Sep 16, 2010
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Hi

Is this a rare PC where the main psu has an external socket for a loud speaker ?

Or some sort of external psu for the loudspeaker ?

Either way you are probably have to buy a new 12 V external psu
Which provides enough amps for amp or sub woofer
3A 40 W does not seem enough
What is ratting of sub woofer or amp ?


Regards

Mike Barnes
 

02ryan48

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I jumped the psu so that it would work without a motherboard and i intend to use the positive and ground connections of the cpu/gpu to power my subwoofer as a cheap option
 

USAFRet

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You're trying to use a computer PSU? Yehah, that probably won't work.
There are many 110v -> 12v transformers out there.
 

02ryan48

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it was recommended to me by 2 people earlier who claimed that they had both done this although i'l be honest i thought it to be a bit out there as well, particularly as i'm no electrician... I've been searching for one however i can't seem to find what i'm looking for, is it possible you could link me on?
 

mbarnes86

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Hi

If you were an electronics hobiest or engineer you would know how to do this

I have seen articles on how to
make a old PC CPU into a 12 V psu
But I would not do it myself .

Transformer is not much use without a rectifier & regulator circuit

google convert pc psu to 13.8v
Gives some articles on this subject

If you do not know about dangers of mains electricity and have experience of soldering you should leave to experts & buy a built unit


Regards
Mike Barnes
 

02ryan48

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would it work if i found a transformer that changed it to DC 12v like i currently have it set up just with more amps?
As it is now it works however only on very low gain, if i exceed this gain the sound just distorts
 

mbarnes86

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Hi
As previously mentioned what is the rating in amp or watts of this amp / woofer ?
Note transformer converts voltage up or down ( but for AC only)
And you need a regulated DC psu at about 13 V
With a suitable power / current rating. ( watt / amp)

Regards
Mike Barnes
 

Deuce65

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Well, why ask us? Why not just ask them?
 
If the subwoofer cabinet has a 25a fuse that is essentially a piece of wire and has no protection value at all. If the sub amp you are using has a 25a fuse than the you will need a 12v regulated power supply with much more than 3 amp output. These are is closer to what you need
http://www.amazon.com/Pyramid-PS14KX-Amp-Power-Supply/dp/B0002JTD20/ref=pd_sim_e_4?ie=UTF8&refRID=1G5X9J3QFNXY9RXHR6AP
http://www.amazon.com/Pyramid-PS21KX-Amp-Power-Supply/dp/B0002JTD2A
PC power supplies don't even come close to powering these kind of amps.