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<blockquote data-quote="Mooncatt" data-source="post: 8674067" data-attributes="member: 676968">Since this also happens when only faded to the rear, is it only one or both speakers sounding bad?Does moving balance between the two rears (so only one is powered at a time) make a difference?When faded to center, can you tell if the &quot;scratchy&quot; sound is coming from the front speakers as well, or still just the rear(s)?Basically the goal is to hopefully narrow this down to just one speaker channel. If it&#039;s just one speaker acting up, it could be that one is blown. To verify, I&#039;d swap it with a known good one (even if it&#039;s one of the other factory speakers). If the replacement speaker sounds ok, chances are the speaker itself was the issue. It wouldn&#039;t hurt to connect it to another location to be doubly sure. If the replacement speaker is also having the problem, then it&#039;s most likely something in the wiring that needs to be traced down. Being a new head unit, I doubt that would be the problem and wouldn&#039;t suspect it unless all other options have been eliminated.Regarding your tweeter, I&#039;d leave the passive crossover in place, especially if it&#039;s a component set with the new door speakers. I don&#039;t know how your factory wiring is setup, but one of my old cars had factory door and dash speakers that were wired in to the same stereo channel. The dash speakers had a bass blocker built in because it would receive the full signal from the head unit, along with the door. If yours is set up the same way and you plan to use the factory wiring, your active crossover in the head unit would still output too low of a frequency for your tweets and damage them. Keeping the passive crossover in place would make sure the tweets are protected just in case.</blockquote>

[QUOTE="Mooncatt, post: 8674067, member: 676968"] Since this also happens when only faded to the rear, is it only one or both speakers sounding bad? Does moving balance between the two rears (so only one is powered at a time) make a difference? When faded to center, can you tell if the "scratchy" sound is coming from the front speakers as well, or still just the rear(s)? Basically the goal is to hopefully narrow this down to just one speaker channel. If it's just one speaker acting up, it could be that one is blown. To verify, I'd swap it with a known good one (even if it's one of the other factory speakers). If the replacement speaker sounds ok, chances are the speaker itself was the issue. It wouldn't hurt to connect it to another location to be doubly sure. If the replacement speaker is also having the problem, then it's most likely something in the wiring that needs to be traced down. Being a new head unit, I doubt that would be the problem and wouldn't suspect it unless all other options have been eliminated. Regarding your tweeter, I'd leave the passive crossover in place, especially if it's a component set with the new door speakers. I don't know how your factory wiring is setup, but one of my old cars had factory door and dash speakers that were wired in to the same stereo channel. The dash speakers had a bass blocker built in because it would receive the full signal from the head unit, along with the door. If yours is set up the same way and you plan to use the factory wiring, your active crossover in the head unit would still output too low of a frequency for your tweets and damage them. Keeping the passive crossover in place would make sure the tweets are protected just in case. [/QUOTE]

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