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Music servers and other computer based digital audio technologies.

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RE: Linear Power Supply or Battery on Mac Mini - pics

Posted by AbeCollins on December 23, 2014 at 06:59:31:

Agree.

The measurements on the power supply are just to check that nothing is grossly wrong. I measured for wide band noise under modest steady state 1-Amp resistive load and also measured under computer load. I wanted to 'see' what a battery would look like vs the TeraDak 'audiophile' power supply.

I'll look at the output of the DAC. And of course listen for any differences. I don't have a spectrum analyzer so the basic scope will have to do.

I also have three more 12v capable power supplies that I'll look at later just for grins:

- Bench linear power supply capable of 12v @ 10-Amp
- Bench switching Power supply capable of 12v @ 20-Amp +
- Agilent Linear Lab power supply 0 - 30v @ 5-Amp*

*This one is insufficient to boot the Mac Mini. Even though the Mini draws less than 1-Amp playing music, it peaks just over 6-Amp momentarily during the boot process causing the Agilent power supply to go into current limit protection.