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General Car Audio
Desperately Need Help with the Speaker Noise
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<blockquote data-quote="rocky99" data-source="post: 8795105" data-attributes="member: 686196"><p>All right I did the Y splitter cable test, some interesting findings.</p><ul> <li data-xf-list-type="ul">The noise is still there if I connect the Y Splitter on the Headunit Side, but disappeared when I connected the Y cable directly to the Amp.</li> <li data-xf-list-type="ul">The noise disappeared if RCAs are disconnected from the amp.</li> <li data-xf-list-type="ul">The noise returned when RCAs were reconnected with nothing connected on the Head Unit side (means RCA plugs on the HU side are just hanging in the air, connected to nothing).</li> <li data-xf-list-type="ul">I tried a brand new RCA pair, same type and brand, connected one end on the amp, nothing on the other side, and just coiled it near where all the power/ground cables are coming into the amp: The noise was still there.</li> </ul><p>So, just the RCAs carrying that horrible noise? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite10" alt=":oops:" title="Oops! :oops:" loading="lazy" data-shortname=":oops:" /> Unbelievable, with all that triple shielding, twisted pair and directional signal.</p><p></p><p>Some questions:</p><ul> <li data-xf-list-type="ul">How come the RCAs are only catching the noise when the Key is in B position, and not when the key is in A position? This is what made me rule the RCAs in the beginning.</li> <li data-xf-list-type="ul">I'm using stringer RCA cables and they have a direction arrow, which is pointing towards the Amplifiers, is this how it's supposed to be?</li> <li data-xf-list-type="ul">Can it be because of the spaghetti of power/ground cables near the amp creating this EMP like environment? (attached picture)</li> <li data-xf-list-type="ul">How to get rid of the noise creeping into this RCA cable?</li> </ul></blockquote><p></p>
[QUOTE="rocky99, post: 8795105, member: 686196"] All right I did the Y splitter cable test, some interesting findings. [LIST] [*]The noise is still there if I connect the Y Splitter on the Headunit Side, but disappeared when I connected the Y cable directly to the Amp. [*]The noise disappeared if RCAs are disconnected from the amp. [*]The noise returned when RCAs were reconnected with nothing connected on the Head Unit side (means RCA plugs on the HU side are just hanging in the air, connected to nothing). [*]I tried a brand new RCA pair, same type and brand, connected one end on the amp, nothing on the other side, and just coiled it near where all the power/ground cables are coming into the amp: The noise was still there. [/LIST] So, just the RCAs carrying that horrible noise? :oops: Unbelievable, with all that triple shielding, twisted pair and directional signal. Some questions: [LIST] [*]How come the RCAs are only catching the noise when the Key is in B position, and not when the key is in A position? This is what made me rule the RCAs in the beginning. [*]I'm using stringer RCA cables and they have a direction arrow, which is pointing towards the Amplifiers, is this how it's supposed to be? [*]Can it be because of the spaghetti of power/ground cables near the amp creating this EMP like environment? (attached picture) [*]How to get rid of the noise creeping into this RCA cable? [/LIST] [/QUOTE]
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