240v to 12v

Discussion in 'Drum & Bass' started by dj__c, Mar 7, 2009.

  1. dj__c

    dj__c Member

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    anyone know where i can pick up a cheap 240v to 12v converter to run a sub in me house
     
  2. justin_credible

    justin_credible Lurker

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    You wanna be careful doing this. Are you planning to use a car amp?
    You need the cable to be of a large enough CSA to take the load that is gonna be pulled by a 200/400/1000 watt amp.

    At 230v using a 1000w amp, ohms law states I(amps)=P(watts)/V(volts)

    so, 1000/230 = 4.4 amps

    At 12v however

    1000/12 = 83.3 amps

    This is a lot of amps. This equation is dona at RMS value not peak.
    I run a car sub using a standard 230v amp, i say its best to leave car audio in the car TBH.
     
  3. Radius

    Radius Give me back my passport u slags

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    Buy a toroidial transformer , and a capacitor , then get a rectifier and you got yourself a linear power supply

    http://www.airlinktransformers.com/

    you need a good cap say a hitano 50v 10,000 upf maybe 2.

    and a rectifier...

    so it goes Toiroid ...rectifier.....caps...remember with the caps your volatge will stay at peak rather than average, so if you choose say a 9v it will rise to around 12v..or something like that ..
     
  4. sam the dnb man

    sam the dnb man Variation

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    i know a guy who can do this.

    Hes gunna do it for me when i buy a few amps off him.

    when he tells me how to do it i will inform you
     
  5. Radius

    Radius Give me back my passport u slags

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    You could just buy a Meanwell power supply the Se 500 12 should handle it ...in fact I got one for sale if anyone is interesed
     
  6. dj__c

    dj__c Member

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    yea was gunna getta active car amp + sub combo n put it in me car when i get it it..
    does anyone actually know any converters/transformers etc that wud handle the current from the 300ish watt amp?