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Sub is doing something odd??| Cone sucks in on low bass notes?


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Ok, i have a MTX 9500 12'' SVC 4ohm on a Soundstream Rub1.2500. The sub is getting around 1000wrms. The sub sounds good and is not blown/ damaged in any way. But on low notes around 13-23hz the sub ''sucks in''? It still moves but it sinks all the way down to were the lip is wrinkled? my voltage is good, and theres not much that can go wrong when wiring a SVC sub... any suggestions??

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- Soundstream Rub1.2500

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low notes? What on earth are you trying to play that plays that low and whats your box like.

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Im gonna guess its playing wayyy below tuning and maybe its out of phase or you switched the polarities.

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1-25hz is completely useless, no real point in even playing it.

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The sub sucks in more than it moves out? Is the DC offset on your amp messed up?

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I had a similar problem on my fi bl 1212 that was seeing about 900 watts. Box was tuned to 3633 and anything under 32the made it do that. So i just didnt play it really low with that box. Always wondered why the sub was doing that the amp was a powerbass asa1500.1

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playing sweeps in the teens-low20s is just pointless unless your trying to fuck shit up!

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I am thinking along the same lines as SnowDrifter. If it really is only sucking in and not pushing out then it seems like your amp could have something wrong with it causing a dc offset so that more power is applied in one direction. Test the sub with a different amp and see if the same thing happens.

My other thought is that it could be loading off of something, keeping cone control on the subs outward stroke but the box cannot keep the same cone control on the backwards stroke causing it to bottom out only in that one direction. Pics of the set up or vids of this would help alot...

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