Okay guys. A couple questions. I just got my hands on this sub for free:
Legacy LWF10X (lwf-10x) 10" Single 4 ohm L Series Car Subwoofer

My question is can I hook it up in my car. Currently, I have this amp:
Hitron HPA400.4 (hpa4004) 400W Max, Pro Series 4-Channel

I have my stock head unit and I am using a line out converter for signal. It is powering my 6.5 inch door speakers, and my 6X9 deck speakers. I was wondering if you could somehow add that sub onto my little system?

Thanks for the help guys.