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Message: <blockquote data-quote="keep_hope_alive" data-source="post: 7995172" data-attributes="member: 576029">shield should be connected to chassis on both ends (HU chassis and amplifier chassis).  this connection is usually inherent in the equipment, so no extra work is required (ahem**Pioneer**) lack of a ground connection on either side can cause noise.  this can happen inside the RCA - which is why i like a two-piece that i can open up and inspect connections. you can also use a DMM to measure continuity.in some cases, grounding only one side (amplifier side) is beneficial.  depends on how the HU outputs are configured.for example:on my older Alpines, i could have the RCA shields ungrounded at the HU and have no issues.on my new Alpine that causes an assload of noise.</blockquote>

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