Further to Core Audio's comments, it's hard to overstate how stupid an idea the CAPS Zuma is - although it would be wrong to take away from Ryan's post that batteries are a bad idea.
Assuming you solve the problem of low-noise AC-DC conversion, by far the next biggest issue is DC-DC switching noise. In fact, unless you deal rigorously with both, there's no point calling a computer transport 'designed for audio'. Get the power right, and you're about two-thirds of the way to the endpoint. Get it wrong, and you're miles off-track.
A motherboard with a single-rail input, or a Mac Mini, or a computer using a PicoPSU suffer equally from the same problem - lots of unnecessary DC-DC switching noise. Game over.
In our experience, using a Red Wine battery with a Zuma-like machine or a Mac Mini is roughly level-pegging - with the latest Macs ahead by a nose sonically. Given that they're also cheaper, more reliable and easier to use, I would suggest the answer to the OP is Mac all the way.
However, as we've demonstrated on this side of the pond, and Ryan's Core Audio products have blazed a similar trail over there, the only way to do this properly is to deliver at least three linear-generated or well regulated battery-powered rails into multi-pin ATX, Molex and PATA.
That's where a computer 'designed for audio' begins. Anything else is rather broken for this application.
Assuming you solve the problem of low-noise AC-DC conversion, by far the next biggest issue is DC-DC switching noise. In fact, unless you deal rigorously with both, there's no point calling a computer transport 'designed for audio'. Get the power right, and you're about two-thirds of the way to the endpoint. Get it wrong, and you're miles off-track.
A motherboard with a single-rail input, or a Mac Mini, or a computer using a PicoPSU suffer equally from the same problem - lots of unnecessary DC-DC switching noise. Game over.
In our experience, using a Red Wine battery with a Zuma-like machine or a Mac Mini is roughly level-pegging - with the latest Macs ahead by a nose sonically. Given that they're also cheaper, more reliable and easier to use, I would suggest the answer to the OP is Mac all the way.
However, as we've demonstrated on this side of the pond, and Ryan's Core Audio products have blazed a similar trail over there, the only way to do this properly is to deliver at least three linear-generated or well regulated battery-powered rails into multi-pin ATX, Molex and PATA.
That's where a computer 'designed for audio' begins. Anything else is rather broken for this application.