What file type do you rip DVD-A to, using what program, and will any DAC play it back?
I use DVD Audio Extactor. You can rip to whatever format you like pretty much. I rip original resoltion/bit depth, typicaly to FLAC. It should work with any DAC that supports the resolutions you rip. I use JRiver Media for a server as it will serve the files in their native resoltion.