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<blockquote data-quote="Pfuse" data-source="post: 3388760" data-attributes="member: 581055">Hey everyone,***Disclaimer***I have very limited knowledge of car audio. The extent of my experience has been installing a HU and a portable xm. So, thanks in advance for putting up with my inexperience.I have a JVC head unit. I have a XM Nexus 50. These are installed in a Kenworth T600.Since the built in FM transmitter in the Nexus is garbage I decided to hook in directly to the HU through a AUX input. The AUX input required an adapter that went from the CD changer control to a set of RCA outputs. From there I have a RCA to 3.5mm jack adapter.I get no whine when using the FM transmitter (just other FM interference), CD or regular FM stations. I do get a lot of whine when hooked into the AUX.Here is my question. If I wanted to do supplemental grounding, where would I start? The adapter, the other RCA outs (like in the pics), or the HU chassis?Any tips would be greatly appreciated. And please, remember that I am not a car audio guy and will probably need any guidance explained to me like I am 5.</blockquote>

[QUOTE="Pfuse, post: 3388760, member: 581055"] Hey everyone, ***Disclaimer*** I have very limited knowledge of car audio. The extent of my experience has been installing a HU and a portable xm. So, thanks in advance for putting up with my inexperience. I have a JVC head unit. I have a XM Nexus 50. These are installed in a Kenworth T600. Since the built in FM transmitter in the Nexus is garbage I decided to hook in directly to the HU through a AUX input. The AUX input required an adapter that went from the CD changer control to a set of RCA outputs. From there I have a RCA to 3.5mm jack adapter. I get no whine when using the FM transmitter (just other FM interference), CD or regular FM stations. I do get a lot of whine when hooked into the AUX. Here is my question. If I wanted to do supplemental grounding, where would I start? The adapter, the other RCA outs (like in the pics), or the HU chassis? Any tips would be greatly appreciated. And please, remember that I am not a car audio guy and will probably need any guidance explained to me like I am 5. [/QUOTE]

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