SA-12 Help?

[ahall_25]

I have 4 sa-12's in a wall and 1 of my speakers has more excursion than the others. anyone know what might cause this?

[bdog]

it could be wired out of phaze. or could be box. put up some pics of it

[ahall_25]

http://i706.photobucket.com/albums/ww64/dk_ah/imagejpeg_0.jpg

This is the only one i have right now, i can take more and even put up a video tomorrow (well later today) but it's the top left one if you're facing the speakers.

[truthsayer]

lots of info needed. How are they wired? Are they on one amp or separates? Were they purchased at same time-meaning are some newer than others?

[bdog]

pull that one out and see if it is wired properly or if it has a ripped spider and check coils with a dmm.

[ahall_25]

the spider is very loose, and that one is new, the dmm reads a final impedence of 2 ohms, which is what we have it wired to..

the top left one http://s706.photobucket.com/user/dk_ah/media/VIDEO1006.mp4.html

Edited September 27, 2013 by ahall_25

[audiofanaticz]

If its much newer then the rest and loose, it could have a softer suspension, maybe 1 less spider used.

It could also have to do with how it is loading inside the wall (the way it is built).

What id try if its wired properly and nothing is torn on the spider is to remove that sub and change its location in the wall, probably the bottom right. Once you swap those subs see if the issue still happens with the sub in the new location, or if the new sub in the top left is now also doing it. If the problem follows the sub chances are its the sub, if the problem stays in its top left position its probably something do to how the woofer is loading due to back pressure.

[ahall_25]

Ok thanks man and if another sub does that how can I fix it if it's back pressure?