Rizlaw,
I got to hear Steve's prototype of the "magic box" as we called it, it's pretty slick - even more so now that I've read what Steve said above and have thought about it some more.
The box uses the same Jansen transformers that's on my Zen Mystery Amp. The transformer goes between the XLR input, and RCA output on the Magic Box.
What's cool, is that you get the higher voltage that the XLR output of your source supplies, but you can send that out to your preamp or directly to your amp. As Steve mentioned, there will be a volume knob to allow you to dial down that voltage to suit your next devices needs.
IMHO - the Jensen transformer seems to add some sparkle to the sound that makes everything running through it sound more *live*. Plus you get the added benefit of using the XLR cables for nice quiet long runs, galvanic isolation, *and* that added voltage you have from XLR conversion gives you more density to your sound (again IMHO). At least it does on Decware gear. :)
The only drawback I see, is that you have to buy a short (preferably really short) RCA interconnect to go from the Magic Box to your device. Beyond that, it's all magic.
Here is a photo of the transformer on my ZMA - so you can imagine a box with two of these, that has XLR on one side, and RCA on the other, and a volume knob in the middle. Just think of it as a high end passive converter from XLR to RCA with a built in attenuation. (because that's what it is!

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