I installed 2 8" subs in the back of my fd with a 1 cubic foot box and i think one of the speakers is partially blown.
Subs are 2 OZ audio vector 8" single voice coil 300w rms wired @ 2ohms, powered by 1 alpine mrv-m500 amp (500w rms).

One speaker plays fine moves and sounds just fine. The other is playing but the cone does not move as much as the other speaker. I just retuned my gains using a multimeter and everything is set right where it should be, but i belive my brother may have turned the base control **** too high along with cranking the volume past the max. (Max volume before distorting)

When i tested the resistance of both speakers the both checked out at abou 4.1ohms, so i am a little confused as how to the resistance could be fine but the sub is blown?

Any audiophiles that can help out with any input would be greatly appreciated!!!!

 

Is the foam good?

 

Its actually a rubber surrond, no damage i can find. The one spider i can see hasnt separated.
Heres a link to the specs if anyone was wondering.

OzV 8.2S4 Subwoofers - OZ Audio USA, Inc.

 

-Are these in a single box with no divider in it?
-With a divider(Chambered box) or separate boxes?

-Have you checked that the polarity of each speaker is connected correctly? That's a 2ohm stable amp so all your (+/-) connections should look like the picture below.

 

Its not a divided camber, but a single camber for both woofers. Wiring is correct as per diagram.

I took another look yesterday and noted the screw holding the negative terminal onto the speaker had come a little loose. I glued it down and put some solder to make sure the screw wouldnt back out again and it seems like it is playing normally again

 

Great. Those easy fixes are the best!