I have $300 on Amazon so I could add a couple hundred if needed but now I'm only thinking about 1 sub. I'd say $300-$400 for all of the equipment and then installation is separate.

I'm thinking of Rockford P3 600W for the sub, 12 in. Ported Enclosure as the box, and Zapco Mono Class d for the amp.

Would this work alright or should I get a different amp for only 1 sub? Also, should I get the 2 ohm sub or the 4 ohm sub? Let me know what you think.