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Message: <blockquote data-quote="gotparts90" data-source="post: 5648473" data-attributes="member: 585140"><p>since the amp rating of the relay type is greater than 10 or 20 amps most people I know would argue it is a contactor.  The diode type is a true isolator the stinger little 2 posts are the best IMO for basic car audio in which you just want to keep the rear bank separate while the car is not running. The 3-4 post isolators do have that little voltage drop and I have never seen one hooked up to car audio only in a ham radio car.</p></blockquote><p></p>

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