For a higher price it would be possible to use an embedded PC and make an in-dash unit as well, though it has been so long since I looked into those devices I don't know if anyone has done it yet nor the quality/availablity of such devices, but a few years ago one could get embedded PCs the size of a 3-1/2 inch hard drive.

The problem is those boards never have decent sound on them. So it is never going to approach the quality of the empeg's output.