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What upgrades are needed?
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<blockquote data-quote="akillj" data-source="post: 8274995" data-attributes="member: 644272"><p>Subs could be out of phase, play the system, make sure their movement is in-sync with eachother. LOC (Low Output Converter) gain could be set too low. Pre-fab boxes are usually built too small, tuned too high, and don't have much port area. This almost always leads in very peaky output in 50-60hz region and quick drop offs below that. Going from a prefab to a custom built enclosure (Built for your subs / car setup) is a night and day difference imo. But since you say you can "barely hear it" I suspect something else is to blame. Start from the source (Headunit) and work your way back. Make sure your headunit is sending a good signal to whatever speaker the LOC is getting its signal from(Meaning that the 'bass' is not on -12 or something for that speaker), check the LOC gains (If it has any), check amp gains ect.</p></blockquote><p></p>
[QUOTE="akillj, post: 8274995, member: 644272"] Subs could be out of phase, play the system, make sure their movement is in-sync with eachother. LOC (Low Output Converter) gain could be set too low. Pre-fab boxes are usually built too small, tuned too high, and don't have much port area. This almost always leads in very peaky output in 50-60hz region and quick drop offs below that. Going from a prefab to a custom built enclosure (Built for your subs / car setup) is a night and day difference imo. But since you say you can "barely hear it" I suspect something else is to blame. Start from the source (Headunit) and work your way back. Make sure your headunit is sending a good signal to whatever speaker the LOC is getting its signal from(Meaning that the 'bass' is not on -12 or something for that speaker), check the LOC gains (If it has any), check amp gains ect. [/QUOTE]
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