I just received my new Ultra from Crutchfield. Very easy to set up. I have tried the analog outputs to my preamp, the optical output to an external DAC, and the USB input of some music files on a thumb drive. All worked. I think the Ultra internal DAC sounds better than optical out to my DAC. My DAC is descent but not high end. But this says I certainly don’t need to avoid using the Ultra DAC. More testing to follow. I want to try the Room EQ and the Bass Management. I might even try connecting the Ultra directly to my power amp to see how that sounds. This one is a keeper.