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Wiring, Electrical & Installation
RCA cables matter?
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<blockquote data-quote="keep_hope_alive" data-source="post: 7341491" data-attributes="member: 576029"><p>he's suggesting you take a wire and ground the shield on one of the RCA's at the head unit. This is a "fix" for Pioneer head units. if the RCA shield loses continuity with signal ground inside the head unit, you can get noise from the amplifier losing it's reference. Only Pioneer is known for that problem.</p><p></p><p>when the car is running, do you get an alternator whine or does the noise change pitch or volume with different engine speeds?</p><p></p><p>did you ground the head unit to chassis or factory wiring harness? i ground head units to chassis when installing amps.</p><p></p><p>if the RCA's are compromised, they can cause issues. you can use your DMM to measure resistance between the center pin and the shield on each RCA (disconnected on both ends).</p><p></p><p>you can try giving the amp a signal from a portable mp3 player to verify if the issue is a ground loop or the head unit or amp.</p><p></p><p>are these new or used components? make/model of the amp?</p></blockquote><p></p>
[QUOTE="keep_hope_alive, post: 7341491, member: 576029"] he's suggesting you take a wire and ground the shield on one of the RCA's at the head unit. This is a "fix" for Pioneer head units. if the RCA shield loses continuity with signal ground inside the head unit, you can get noise from the amplifier losing it's reference. Only Pioneer is known for that problem. when the car is running, do you get an alternator whine or does the noise change pitch or volume with different engine speeds? did you ground the head unit to chassis or factory wiring harness? i ground head units to chassis when installing amps. if the RCA's are compromised, they can cause issues. you can use your DMM to measure resistance between the center pin and the shield on each RCA (disconnected on both ends). you can try giving the amp a signal from a portable mp3 player to verify if the issue is a ground loop or the head unit or amp. are these new or used components? make/model of the amp? [/QUOTE]
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RCA cables matter?
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