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Help with ground loop issues
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<blockquote data-quote="Bun-Bun" data-source="post: 7711058" data-attributes="member: 584852"><p>The head unit is grounded directly to the trunk battery. Everything stereo related is grounded at the trunk battery. Head unit is powered/grounded by 8 gauge wire. Battery to distro blocks is 1/0 gauage and distro blocks to amps is 4 gauge. Trunk battery to front battery is 1/0 gauge.</p><p></p><p><img src="http://pics.livejournal.com/bun_bun/pic/0015pxp7" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>[ATTACH]26531927[/ATTACH]</p><p></p><p>[ATTACH]26531928[/ATTACH]</p><p></p><p>He does seem like a pushy salesman. I know a good set of RCA's can reduce noise, but I already have a good set of RCA's.</p><p></p><p></p><p>Everything is grounded directly to the trunk battery.</p><p></p><p></p><p>I have read conflicting opinions on this. To my understanding of electrical theory grounding everything stereo related to the same point is the best case scenario in regards to ground loops. Which is why I wired my stereo such that everything is connected to the trunk battery for both power and ground. But now as I go deeper into reading there are installers claiming that wiring amps to the same ground point will cause noise and other issues (artefacts in tweeters on bass hits for example).</p><p></p><p>That said I know you can ground at separate points and have a clean system as well. I never had problems with alternator whine before this car and I always grounded to body/frame of the vehicle before. This was the first car I wired everything to the trunk battery and the first time I had alternator whine (though that was because I was lazy and didn't finish wiring the head unit at first and used stock wiring).</p><p></p><p>My problem now doesn't seem to be a ground loop issue but more a EFI into RCA issue coming from the sub amp. Which makes sense because I couldn't understand how I could possibly have a ground loop issue with everything powered and grounded at the trunk battery. Where is the potential for loop?</p></blockquote><p></p>
[QUOTE="Bun-Bun, post: 7711058, member: 584852"] The head unit is grounded directly to the trunk battery. Everything stereo related is grounded at the trunk battery. Head unit is powered/grounded by 8 gauge wire. Battery to distro blocks is 1/0 gauage and distro blocks to amps is 4 gauge. Trunk battery to front battery is 1/0 gauge. [IMG]http://pics.livejournal.com/bun_bun/pic/0015pxp7[/IMG] [ATTACH=CONFIG]26531927[/ATTACH] [ATTACH=CONFIG]26531928[/ATTACH] He does seem like a pushy salesman. I know a good set of RCA's can reduce noise, but I already have a good set of RCA's. Everything is grounded directly to the trunk battery. I have read conflicting opinions on this. To my understanding of electrical theory grounding everything stereo related to the same point is the best case scenario in regards to ground loops. Which is why I wired my stereo such that everything is connected to the trunk battery for both power and ground. But now as I go deeper into reading there are installers claiming that wiring amps to the same ground point will cause noise and other issues (artefacts in tweeters on bass hits for example). That said I know you can ground at separate points and have a clean system as well. I never had problems with alternator whine before this car and I always grounded to body/frame of the vehicle before. This was the first car I wired everything to the trunk battery and the first time I had alternator whine (though that was because I was lazy and didn't finish wiring the head unit at first and used stock wiring). My problem now doesn't seem to be a ground loop issue but more a EFI into RCA issue coming from the sub amp. Which makes sense because I couldn't understand how I could possibly have a ground loop issue with everything powered and grounded at the trunk battery. Where is the potential for loop? [/QUOTE]
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