PSU+Car Amp?

Discussion in 'The Projects Forum' started by vinny8765, Nov 2, 2013.

  1. vinny8765

    Thread Starter New Member

    May 28, 2012
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    Would it possible to operate a car head unit and a 400W amp off of a 430W PSU?
     
  2. DerStrom8

    Well-Known Member

    Feb 20, 2011
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    Are you considering using it inside the automobile, or outside?
     
  3. vinny8765

    Thread Starter New Member

    May 28, 2012
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    It's a setup in my garage and/or room
     
  4. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Yes they are ideal...
     
  5. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    Car amp draw a lot of current at 12V. In yr case for 400W it will be 33Amps.
    Are u sure the PSU won't go into protection when the heavy bass starts thumping ?
     
  6. tubeguy

    Well-Known Member

    Nov 3, 2012
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    Power amps aren't 100% efficient, so the 400 watt amp may draw, for example 10-20% more power than it "puts out". (depends on the particular amp). So if you try to drive it steadily at max output it may overload the supply.
    But hopefully you won't need it that loud in your room.
    Do you have neighbors, parents ?? :p
     
  7. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    I would be more inclined to use a 12V automotive starting battery and a ~10A 14V PSU to keep the battery charged...
     
  8. bertus

    Administrator

    Apr 5, 2008
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  9. adamclark

    Member

    Oct 4, 2013
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    great idea,, this would also get rid of a lot of the noise floor class a-b, and d amps tend to have naturally,, add a psu and the "hum" might get annoying..
     
  10. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    +1 You could use s smaller motorcycle battery which can be bought for about $50 and puts out about 220A peak crank current.
     
  11. vinny8765

    Thread Starter New Member

    May 28, 2012
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    Itll be a dedicated psu, and is noise floor audio distortion?
     
  12. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    No, noise is noise.
     
  13. vinny8765

    Thread Starter New Member

    May 28, 2012
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    Could i use two exact psu together?
     
  14. vinny8765

    Thread Starter New Member

    May 28, 2012
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    I am leaning towards the small motorcycle battery idea, would I have to worry about the amp-hour rating? Or just the cold cranking amps? Because with my cheap PSU the hum is getting to be irritating
     
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