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

Hi,

Hmmm...

You should try a SMPS optimised for audio.

It can easily better the battery. Here for fun, something I have been working on:



This is delivering 1.25A @ 15V.

When delivering 3.75A (a bit past the official 3.5A limit) the 50Hz AC related components (100,200, 300Hz) are around doubled, rest pretty much the same.

Note the switching frequency itself is at around 3uV or -116.5dB below a 2V RMS signal - yup a PSU with better than 19 Bit equivalent HF noise...

Thor

At 20 bits, you are on the verge of dynamic range covering fly-farts-at-20-feet to intolerable pain. Really, what more could we need?

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