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<blockquote data-quote="Umbra" data-source="post: 8525511" data-attributes="member: 658055"><p>If there&#039;s a bass boost option make sure that&#039;s all the way down. Set the gain to match the head unit&#039;s RCA output voltage (often 2V) if the dial has voltage markings. The HPF being set wrong probably doesn&#039;t affect the amp going into protect, but HPF is the high pass filter. You&#039;d want this set low for a sub, like 32Hz low. If there&#039;s a LPF (or low pass filter), or a switch to set this instead you&#039;d want this around 80Hz. Sometimes you can set this on the HU as well, but then you&#039;d want the filter on the amp off or &quot;through&quot;. If you have a subsonic filter you want that at like 30Hz. The wire gauge looks look. Maybe if the 6 gauge is aluminum and you&#039;ve got like a 20&#039; run it could be problematic, but I&#039;d first make sure your grounds are solid. It should have a ring terminal and be bolted to unpainted (or sanded) metal.</p></blockquote><p></p>

[QUOTE="Umbra, post: 8525511, member: 658055"] If there's a bass boost option make sure that's all the way down. Set the gain to match the head unit's RCA output voltage (often 2V) if the dial has voltage markings. The HPF being set wrong probably doesn't affect the amp going into protect, but HPF is the high pass filter. You'd want this set low for a sub, like 32Hz low. If there's a LPF (or low pass filter), or a switch to set this instead you'd want this around 80Hz. Sometimes you can set this on the HU as well, but then you'd want the filter on the amp off or "through". If you have a subsonic filter you want that at like 30Hz. The wire gauge looks look. Maybe if the 6 gauge is aluminum and you've got like a 20' run it could be problematic, but I'd first make sure your grounds are solid. It should have a ring terminal and be bolted to unpainted (or sanded) metal. [/QUOTE]

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