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Pre-out for sub in-op

Can't get anything from my pre-out for my sub. Sub is toggles "on" in speaker set-up. Any other tricks, or could the pre-out be bad?

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  • chasleyko Dec 15, 2007

    Sub is powered, hums when I touch RCA plug, sub is toggles to "on" in speaker set-up. Isn't pre-out basically just a line output? and how would it go bad?

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  • 231 Answers

First make sure the actual sub is powered on .You can tap on the RCA leading to the sub and hear the sub humming..Im assuming you do have a powered sub connected to sub out of receiver .Also you could also connect another type of speaker with RCA to make sure if it has output or not..Also make setup does have sub output ON..thanks

Posted on Dec 15, 2007

  • crispin melchor Dec 15, 2007

    yes sub-out is just a line level output but just outputs low frequencies thus'sub out"..well as far as how its not working ..hard to tell .unless preamp board is small board inside and not seated properly to other boards..if you have owners manual .you can try to reset unit and see what that does..if unit has other variable pre-outs that are working .then you can you use one of those pre-outs and connect a line level low pass RCA filter.that way it filters out high/mid frequencies and passes only the low frequencies to sub..

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