The C12a is rated for 400rms and it came in either single 4 or 8ohm impedence.
-sensitivity 89.56
-frequency response 25-2k
-polymineral cone

Find out the impedence and then you can start looking for an amp.
This driver was designed for sealed box's and I would look for an amp ~600-800rms for best performance from these.

lol guess i was way off. could hardly find anything for that sub on google.

ya i could hardly find anything either, but i am pleased to find out that its that high, it seemed to me that the were taking more than 150 when i was playing them in my house, but then again wth do i know lol. And ya they are 4 ohm, i already knew that, sorry shoulda said it. ;) , so then that amp under powers em by a bit, ok. Ya they are in a sealed box, but is that the only way to do it, because i would way rather port the box, is that a bad idea?

o ya and where did you find that info on its specs? I was just wondering, cause i didn't find anything near that, anyway, when i put the subs in my car i gave em a testing, and it made my RV mirror rattle quite loudly, do i just have to deal with u figure? or waht can i do, i mean putting my hand on lightly shuts it up....
Ty
Seth