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Message: <blockquote data-quote="egroeg555" data-source="post: 8136458" data-attributes="member: 656059">Hi, I'm looking into upgrading the base audio system in my 2013 Focus ST.  I'm not sure yet if I'll do it myself or have a shop do it.  Though, today I stopped by a local car audio shop and they were suggesting to keep the stock head unit, and add an amplifier or sound processer + amplifer.They said that I would get good sound with this setup, which suprised me as it has been my understanding that if you have a low quality signal from the stock head unit, you can't just fix it with an amplifer, you need to replace the head unit and get a quality signal from the start.Can anyone comment on this or have suggestions?  Thanks.</blockquote>

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