My head unit has two sets of RCA pre-outs (and so does the empeg, right?), but each only has one set of aux-ins. What do you do here? Fading isn't that important, should I just use the two front chanels? Is there advantage to combining front and rear? Does that mess up the audio in any way? (Like 8v preouts on 1v in instead of 4v on 1v :) ?)

[ johnmcd3 - funding for my empeg purchace: 65% complete ]
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1998 BMW ///M3 30 GB Mk2a, Tuner, and 10 GB backup