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Message: <blockquote data-quote="Joebobclark" data-source="post: 8324756" data-attributes="member: 574696">Its the step down module in the phone charger.... it steps the 12v+ of the vehicle down to the 5v of the phone input...  They are cheap components and make alot of electrical noise doing it. Only real way to fix will be try different chargers/inverters until you find one that doesnt have too much noise/buzz, or find a way to isolate the phones ground from its speaker/3.5mm output ground (not going to happen, sorry)...Maybe a power conditioner type module (something like this, <a href="http://www.amazon.com/Pyramid-NS12-InLine-Noise-Suppressor/dp/B0007V5X4U" target="_blank">Amazon.com : Pyramid NS12 12 Amp InLine Noise Suppressor : Vehicle Amplifiers : Car Electronics</a>) in the power wire going to the 12v port that you plug the phone charger into.... may at least take some of the buzz out....</blockquote>

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