Does it go through A/D-D/A or does it pass the signal through purely in the analog domain?
Since the DSP handles it all, and since the EQ is digital, and since the EQ will work on the Aux input, I'm pretty sure it does the A/D-D/A thing.
But I also know that it's very high quality and you shouldn't worry about generational loss at that level.
Also keep in mind that if you went the other way around (going from the empeg into the Aux In of an aftermarket CD player), it'd probably be the same thing. The DSP in the empeg is the same kind of device that they use in car CD players. The specs of the DSP are available in PDF format from the web. I think it's an SAA7705H.
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Tony Fabris