rms power and sub recommendation

[flood77]

ok so for those who know im unhappy with my current set up and know what subs im running and if you dont their the sundown sa-d412(x4)

ok so i know the rms is 600 for these subs and im putting a 1000 rms to each one,am i doing the wrong thing here because i have a funky hard vibrating sound coming from one of them, atleast i think it just one.i thought maybe it was bottoming out,so i took it to the installer and the salesman said it did sound like it was bottoming out so i took it to another shop and they said it wasnt bottoming out and that it may be the enclosure itself ,now these subs are about 6 months into being used.is there a way for me to determine if there bottoming out since im getting different opinions from two different shops?

and also can tuning to low cause a sub to bottom out?

[Nightshade]

Pull the stubs out of the box and check the triple joints on them. If you play below tuning this is a possible point of failure on any sub. The way to check is to push out on the cone and look for any cracks or seperation where the back of the cone is glued to the spider. Another possibility is that one of the dust caps has come unglued and is an easy fix to reglue it.

[flood77]

ok so i pulled the subs and found nothing i also pushed in the sub as far as i could(slowly) and no rubbing,grinding and never hit a bottom.

[BobbyG2]

Is it the closest sub to the port?

[flood77]

their all relativly close to their port.but this is pretty sudden that it started doing this

[Jessica]

Arent you the guy with the four sealed boxes with pvc in them? Your boxes are kinda small and without actually seeing the box there is no real way to know what volume it is per sub, plus you dont have enough port area at all. That noise is probably that pvc rattling around in the box, did you check to make sure they are glue together good?

[Jessica]

You really should go take pictures and upload them to photobucket. Then paste the URL of each image here. Don't worry about embedding, or the URL tags. We can fix that if it's too much trouble.

edit:

here read this it will help

http://www.stevemeadedesigns.com/board/topic/160056-how-to-post-pictures-on-the-forum-photobucket/

[flood77]

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[flood77]

that box measures 45 wide 38 tall and 10 deep

the to top subs the port runs inside and straight up

the bottom subs the ports run straight down

and as you can see theirs alot of room behind the box and the cab,the front of the wall is where the front of the bench seat was

[Guest]

could be the baffle vibrating. i only see a single baffle with no internal bracing.