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Hi,
I recently installed the DDX812 into my C6 Vette running the 5.1 channel with 3 separate amps.

When I first start the car/headunit, I don't hear any hiss or static. After about 10-15 minutes of warmup or when the HU gets warm, I hear a hiss/static through ALL speakers. It is very noticeable and annoying at low volumes.
I'm about 99% sure it is not the amps as I've switched them around and even used a completely different amp and the noise is still there.

Any ideas? I have not contacted Kenwood yet as I like to see if anyone else out there have ideas/info?

If it's a grounding issue, shouldn't it be apparent right away?

Thanks for any info.

Steve
 

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Does it make the noise on all sources?
 
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