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<blockquote data-quote="dtbrown" data-source="post: 5221661" data-attributes="member: 570125">Ok, here are your things you need to trouble shoot.&nbsp; First check and make sure the polarity of the sub is good on both coils.&nbsp; Some times Sub companies that hand make subs will reverse wire the outputs by accident.&nbsp; So test each coil with a battery to makes sure they are in phase.Assuming that the sub wasn&#039;t the problem, second your impedance rise may be crazy high depending on what kind of box you have sub in.&nbsp; What kind of box is it?&nbsp; Ported, sealed, prefab, etc.&nbsp; So at 4 ohms nominal you may be rising to as high as 12ohms and not getting much power at all.&nbsp; And to run that amp at 1ohms you&#039;ll have to monitor amp closely to make sure it doesn&#039;t get to hot.&nbsp; Best way to know if you can run that amp at 1ohms is power test and see your impedance rise.&nbsp; If you rise 3 ohms you&#039;ll be good.&nbsp; Also to&nbsp; run that amp at 1ohms you single 4ga wire won&#039;t cut it.If all that checks out and you still same problem then check ground and make sure it&#039;s got good contact to metal.&nbsp; And only having one run of 4ga to that amp isn&#039;t helping either.&nbsp; At least 2 runs of 4ga for power and ground from battery and make sure battery is grounded well too.&nbsp; It may look small physically but that&#039;s a strong amp.&nbsp; Check those things out and get back to me.</blockquote>

[QUOTE="dtbrown, post: 5221661, member: 570125"] Ok, here are your things you need to trouble shoot. First check and make sure the polarity of the sub is good on both coils. Some times Sub companies that hand make subs will reverse wire the outputs by accident. So test each coil with a battery to makes sure they are in phase. Assuming that the sub wasn't the problem, second your impedance rise may be crazy high depending on what kind of box you have sub in. What kind of box is it? Ported, sealed, prefab, etc. So at 4 ohms nominal you may be rising to as high as 12ohms and not getting much power at all. And to run that amp at 1ohms you'll have to monitor amp closely to make sure it doesn't get to hot. Best way to know if you can run that amp at 1ohms is power test and see your impedance rise. If you rise 3 ohms you'll be good. Also to run that amp at 1ohms you single 4ga wire won't cut it. If all that checks out and you still same problem then check ground and make sure it's got good contact to metal. And only having one run of 4ga to that amp isn't helping either. At least 2 runs of 4ga for power and ground from battery and make sure battery is grounded well too. It may look small physically but that's a strong amp. Check those things out and get back to me. [/QUOTE]

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