its two rca in and you get 8 output out. You dont need all that.i called ppi and they want $25 for that harness with the rca on it...
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the aux input works as an RCA source man. You only need to connect one pair of RCA to it. Unless you are using something else as a source other than your PRS. I'd just recommend using the 80 prs and playing your tablet through the 80 prs.that an aux input.
its either that rca harness or just wire the speakers wire from h/u to harness.