MTX Terminator Specifications?

I got an enclosure with two of these in it from the dump today. I just tested them out with my home stereo and I get sound, so they seem to work fine. Only thing is, I can't find any info on them anywhere. The enclosure was moldy and gross, so I want to build my own, but can't without the T/S info. The MTX site doesn't mention anything about terminators, and googling doesn't reveal anything. They're 7" and the say "MTX," Terminator," and have a big "T." if anyone knows anything about them or can point me to info, that owuld be awesome.

WinISD has them in the beta version.  I used to have a 15" in a big ported box, was pretty good for a first sub.

Thanks! I don't have any subs right now, I'm basically just piecing together a car stereo for free. My dad's a mechanic, and he got a parts car with a nice deck in it so the only thing I need is an amp.