Hi Mark,
Do you mean something like this below that contains just the Pi and the DAC? Thereby allowing you to make any of your "wired" systems work like the AxiomAir.
Ian,
It would be interesting to see if there is any demand for the Pi, DAC, AND AMP in a self contained package. I have a pair of M3's being driven by an old receiver and an Apple Airport Express for streaming. It would be great to get rid of the old beast, and replace it with this - It would fit the bill perfectly. Plus the power upgrade wouldn't hurt either.
