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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > Quick question about sub pre-outs



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      09-29-2014, 03:05 AM   #1
JU57AJB
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Quick question about sub pre-outs

Just a quick one here, I have the Eonon head unit and it has 2 RCA sub outputs labelled Sub 1 and Sub 2, each consists of 1 RCA plug.

Does anyone know if I should take the first sub out and split it to plug into the 2 inputs on the amp, or plug both sub outs, each into an RCA input on the amp?

Or will it effectively make no difference? I kind of suspected the 2 sub outputs would just be 'split' inside the head unit rather than being 2 different channels.

Thanks
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      09-29-2014, 03:43 AM   #2
bacardi198
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Since bass is relatively omnidirectional, you should be able to use a RCA y-splitter cable to divide the signal from the Sub 1 output to a L/R input for your amp.

Honestly it may just be a case of bad translating and Sub 1 is L output and Sub 2 is R output, in that case just run the RCA cables from your amp to the HU, and connect S1 to L, and S2 to R, and you're good to go. If there isn't a separate level adjustment for Sub 1 vs Sub 2 in the audio settings, I'm willing to bet it's just a bad translation or something along those lines.

Good luck brother!
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      10-01-2014, 02:33 PM   #3
JU57AJB
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Thanks dude! That's how I've wired it up, sub 1 and 2 to the left and right inputs on the amp. I have it set to mono on my line driver anyway so doesn't matter which way round they go.
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