what pre outs does your head unit have? are you running a sub? all needed info. i'm assuming you have a sub and 2 pre outs? you need male 2 female y cables, then two pair of regular shielded rca's. keep the lengths as short as possible. however, you could also not use y adapters, and jump from amp 1's output rca's to amp 2's input rca's. this of course depends on the amp and possible speakers.
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