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<blockquote data-quote="achapa1025" data-source="post: 1075126" data-attributes="member: 561100">ok heres what going on i just recently bought a 1242 type r and there 600w amp alpines like 605m or something i got 4 gauge wire running to it and i know the sub is olny 500 w rms but every one says it can take a lot more so i got a 600w amp anyways i built a ported box 1.8 cu but 1.3 minus port so anyways when at high volume with gain on 1 goes from .1 to .3 .5 .7 1 1.5 2 4 8 are gain settings and on 1 with like +8 bass boost on goes by 2s up to 16 at high voulme on certain bass hits it sounds like the sub is knocking or hitting something there is plenty of clerance i have no idea and help or ideas what it might be am i over powering it?also if i turn the bass boost down to like 4 and gain to 1.5 it dosent knock or what ever its doing my friend didnt hear it but he said it might be the sub ******* in and out air from the port i only hear it when i am facing the sub i have a hatch so when i open it to look at the sub adjust amp etc i hear it but in front seat no idea its doing thatthank u so much for any comments</blockquote>

[QUOTE="achapa1025, post: 1075126, member: 561100"] ok heres what going on i just recently bought a 1242 type r and there 600w amp alpines like 605m or something i got 4 gauge wire running to it and i know the sub is olny 500 w rms but every one says it can take a lot more so i got a 600w amp anyways i built a ported box 1.8 cu but 1.3 minus port so anyways when at high volume with gain on 1 goes from .1 to .3 .5 .7 1 1.5 2 4 8 are gain settings and on 1 with like +8 bass boost on goes by 2s up to 16 at high voulme on certain bass hits it sounds like the sub is knocking or hitting something there is plenty of clerance i have no idea and help or ideas what it might be am i over powering it? also if i turn the bass boost down to like 4 and gain to 1.5 it dosent knock or what ever its doing my friend didnt hear it but he said it might be the sub ******* in and out air from the port i only hear it when i am facing the sub i have a hatch so when i open it to look at the sub adjust amp etc i hear it but in front seat no idea its doing that thank u so much for any comments [/QUOTE]

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