Advice on how to modify, and a subwoof question
#16
Lexus Champion
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Originally posted by lexus_sc400_n20
That high pitched sound is coming from your alternator, and the sterio amplifies it. It is known as a ground loop. You can get a ground loop isolator at radio shack
That high pitched sound is coming from your alternator, and the sterio amplifies it. It is known as a ground loop. You can get a ground loop isolator at radio shack
Tim
#17
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I have that same sound too on AM. I am going to Radio Shack today.
Can anyone tell me where the Nak amp is located in an SC4? I assume that is where this Ground Loop piece will connect.
Can anyone tell me where the Nak amp is located in an SC4? I assume that is where this Ground Loop piece will connect.
#19
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I have that same sound too on AM. I am going to Radio Shack today
Do you guys buy that?
#20
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that is definatly alternator whine, try searching for a DC filter that you can put between your amp and electrical system. search for noise filter on ebay. Your going to have to look up the schematics for the factory amp, and locate the 12V imput, and the ground, and that product should work like a champ. Something similar to this:
![](http://imagehost.auctionwatch.com/bin/imageserver.x/00000000/thunderbird1191/MVC019SFILTER.jpg)
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mynoles1
Lexus Audio, Video, Security & Electronics
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09-26-03 12:20 PM