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30V Power Supply for AMP100

Marco Krickl

May 10, 2022 17:46

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Hello
How much amp i need,would be 6,2A enough ?

best regards 
MK

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6 comments

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  HiFiBerry team May 11, 2022 04:33

  That should be fine.

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  Harold Dale May 17, 2022 02:43

  Just wondering how would 6.2 amps be enough? That's only 186w and that's if it were 100% efficient. I've been looking for a PSU that would work all day and not finding much that was more than a few amps. It seems to get the most out of it you'd need more like 10amps or so.

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  HiFiBerry team May 17, 2022 04:53

  You will never run the Amp with 200W power all the time. There is a so-called "Crest factor" that shows the Peak-to-average power ration. With music this is >3, usually even much higher (5-10, depending on the music style). Therefore, you don't need a power supply that can continously deliver the peak power.

   

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  Harold Dale May 17, 2022 05:12

  Sure I guess that's true, just seems like you would want to provide more though. What PSU do you recommend then? Is there benefit to a linear PSU with this thing?

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  HiFiBerry team May 17, 2022 05:14

  No, "linear" PSU are almost never "linear" (except you use a battery) but switch at 100Hz - which is in the audible frequency range. A well-design SMPS is the best choice.
  We recommend this one:

  https://www.hifiberry.com/shop/accessories/power-hifiberry-180/

   

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  Harold Dale May 17, 2022 05:25

  Hmm wish that one was on Amazon lol, have a bunch of gift card on there and where I was gonna order the amp100 from.