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Message: <blockquote data-quote="peter_parker" data-source="post: 2674992" data-attributes="member: 902954"><p>I wanted a good job done on the install of the stereo in my new car so I paid an 'upmarket ' place to do it. when I first got it back, there was a loud hissing noise indfependent of the motor or even the stereo being turned on. After a bit of arguing, they fixed it but the fix only lasted a short time. Now I get a hiss through the left front  tweeter that lasts a few seconds whenever I turn the igniton on or whenever I use my left indicator. The car sound dewds tried telling me it's the fault of the Ford head unit but there's a hiss even when the head unit's not on. I don't want to let those idiots loose on my car again. Any suggestions? It's a soundstream amp running 4 speakers and the sub.</p></blockquote><p></p>