Sorry, I do not know anything about your head unit.

But as for me, I liked having my Rio run through my head unit. I liked the fact that I could manipulate it all better. Also keeps ware and tear on the Rio down to a minimum. Because I can adjust my treble or bass on the final out from my head unit. Instead of always messing with the clumsy controls of the Rio.
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======================================== Mitsubishi Eclipse V6 GT Rio Car 60 Gig unit