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im stumped - subwoofer issues

Old 03-07-2011, 04:14 PM
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im stumped - subwoofer issues

so i plugged in the remote gain control i had purchased for my sundown sae-1200d v2.

im running an fi q 12 ported to 34 hz.


might just be a fluke that the problem started right after i plugged it in.



the sub seems to sound like its just blowing air when it comes down to the lows in a song or almost missing the note. gone through and tuned it twice now with 2 different people. it was working fine up to about a week ago. ive only had the sub for about a month and a bit.

any ideas on what the problem could be. it isnt giving out that deep bass note as strong as it used too.

Thanks,


Alex.

Edit: i also have a battcap in the rear aswell (2 batteries running)
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Old 03-07-2011, 04:49 PM
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Push on the cone, does it feel like it's scratching on the inside?

Is it a loss in volume or does it not sound the same? Subs kinda blow air so you'll have to be a little more descriptive in either terms of dB & odd sounds.

What's the port dimensions and NET air space?

Amp? Music? How much do these two people know?

Have you unplugged the remote and was it set above zero? lol
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Old 03-07-2011, 05:00 PM
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its not giving that same low tone when its hitting the low's almost like theres a hole in the back of the box or something.

as for port size and net air space ill have to ask jalat the main guy i worked with on the project. he spec'd and built the box.

like i said the amp is a sae-1200d v.2

music is mostly hiphop/dubstep.

im not too sure what you mean by was it set to zero. was the remote set to zero when it was unplugged?

i since had someone else play with the subsonic and gain on it to see if they could figure it out. it still seems to be missing that real low note or just not being able to produce it.


Thanks,

Alex. (heading outside to check the cone right now)

EDIT: cone feels smooth with no rub.

Last edited by bunzy12; 03-07-2011 at 05:07 PM.
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Old 03-09-2011, 03:11 PM
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if you unplug the remote gain control, does it still do it. Is it possible that you changed your subsonic filter tuning?. Could also have cracked your box. Start with the basics See if you turned the "Loudness/BBE/XBASS?whatever that brand of HU calls it" on by accident..unplug the remote gain.. if the problem is still there.. check to see if any of the screws holding your sub in came loose. If the problem is still there, take out the sub and check if your port is still sealed to the box properly, or if one of the joints in the box has cracked.

A generous helping of PL premium in all the seams usually does a lot of good.

If after that, the issue remains, take it to a pro
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Old 03-12-2011, 04:09 PM
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i opened it up the box looks fine and still holding together.

heres a video of the sub out at medium level. it make a very wierd sound.


VIDEO: http://www.youtube.com/watch?v=d65qUUXwwLI

its making a very wierd clapping noise. and not hitting lows in the box. also the box was moved slightly to bolt it down in the back would the effect the sq through the car.
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Old 03-12-2011, 05:33 PM
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Does it happen at any volume or only when the system is turned up?

Seems like you may be sending a distorted signal to your sub. Mine does the same thing if I crank up the gain too much.
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Old 03-12-2011, 06:11 PM
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is the box still facing the same direction as it was originally?


Originally Posted by n0catchyname View Post
Does it happen at any volume or only when the system is turned up?

Seems like you may be sending a distorted signal to your sub. Mine does the same thing if I crank up the gain too much.
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Old 03-12-2011, 07:04 PM
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As was previously mentioned sending dirty power to the sub would do this. When it's not being fed a clean signal it will almost sound like its farting (Best analogy I have heard/can think of) So.. turn your gain all the way down, put it on 1/4 volume, if the sub runs fine then I would look at the amplifier as the culprit. A sub either works or doesn't; It wouldn't run fine at low volumes and then just start acting funny when you turn the system up, so long as it's being run within it's ratings, obviously going over it's maximum capacity will have undesirable results.
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Old 03-12-2011, 07:34 PM
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its only having 1000wrms put to it and yes the sub is still facing the trunk.

amplifier worked fine before.. its a referb . i was told it could be one of the voice coils possibly?
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Old 03-12-2011, 07:38 PM
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like i said just recently it started doing it. so thats whats got me lost.

what could cause it to all of a sudden cause it to start sounding like a farting noise at high volume levels without the low grunt or power it used to have.
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