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Message: <blockquote data-quote="Umbra" data-source="post: 8285682" data-attributes="member: 658055"><p>I'm not entirely clear on the wiring either, but I had a similar setup. I had a HU with only one set of preamp outputs, so I bought Y splitters to get "two" sets at the HU so I could have one for the speaker amp and a second for the sub amp. Start troubleshooting. Take the splitter out of the equation. If it works, then my guess is the splitter *****. If it doesn't, see if you can isolate it to the cables or the outputs by swapping things around. My Y splitters were like $5 on Amazon, but A) you could have gotten unlucky with a random bad item and B) **** at those shops are seriously marked up; it's probably only cost them a couple bucks.</p></blockquote><p></p>

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