The ART D-I/O DAC that was hugely popular a couple of years ago had a very high output. I think it was possibly even more than 5 volts. There were lots of mods performed on these too.
How are you going to be using a DAC only for frequencies below 200hz? What are you going to use for the frequencies above 200hz?
Either you're confused about the purpose of a DAC or you've come up with a usage that I've never imagined. And I've been around the block a few times......
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