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Discussion Starter #1
Ive tried looking this up but I can't find anything in detail. I have an 02 type s and it has the bose amp under the seat, and I installed a touch screen radio and the sound works everything works fine and sounds fine, however I have a whine with the engine on, coming through the speakers. It gets louder when I turn my AC and/or headlights on and gets louder as I rev the accelerator.

I tried a ground loop isolator behind the radio, didn't help.
Tried a new ground, didn't help.

The only way the whine goes completely away is if I unplug the RCAs behind the touchscreen radio, which is the sound - obviously.

Any input? I would be okay with bypassing the amp but I'm not sure how to, can I just splice the wires going TO the amp and put RCA's on the ones that belong to the speakers, and connect them to the radio directly?
 

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i would of thought it was your ground are you sure you have a good ground connected make sure its not on a painted surface if so sand it down but im pretty sure that only happens when you have a bad ground i could be wrong but im mostly sure it could be your ground
 

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Shielded RCA cables may help, and keep them separated from the power wire if possible.
An inline power line filter might be necessary to eliminate the whine, about $14 on fleeBay.
 

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Discussion Starter #4
The ground has behind the radio been moved and didn't change anything, I don't know what other ground to check. Ill try a different adaptor tomorrow as well as different RCA cables.
 

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bleep-bleep bleeeep
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Post in the Radio/Electronics section.

To me... it sounds like the alternator whine is bleeding into your new head unit. Video screens can emit RF; but it's usually not dependent on engine RPM.

Does the whine go away with the engine off? And exactly what make/model unit did you install?
 

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Discussion Starter #7
I installed the Dual XDvd1262 and the whine is only there with the engine on. I just installed a new wire harness and used good connectors and I think the whine is limited now to only when giving gas but I won't know for sure until later when I start it when its cold, thats when it mainly does it - or when I can hear it the most.
 

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Shielded RCA cables may help, and keep them separated from the power wire if possible.
An inline power line filter might be necessary to eliminate the whine, about $14 on fleeBay.
^^ this. You have to route the audio cables separately from power cables or it will whine. Also beware of other oem power wires. There's a huge wad of them under the console that may or may not be speaker wires.
 

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bleep-bleep bleeeep
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Also... try to avoid signal/speaker wires being parallel with a power wire. If you can keep the power wires perpendicular to the signal wires; there will be a null where very little interference (or bleed) takes place.
 

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Discussion Starter #10
I fixed it.

I installed the new wire harness and used twist wire connectors for better shielding from other wires instead of just electrical tape. That with the ground loop isolator the only whine I hear is the veerrrry slight whine from I believe the alternator. Whatever it is, its almost unnoticeable - and bearable.
 
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