Yeah well i suppose it's all personal preference. I think the Focus is small enough where the extra boom with a ported box isn't necessary. I only plan on running this at 5-600wrms, and i'd love to push 8-1k, but i don't think the sub will handle that power. TBH it's a cheap sub lol. So yeah with a ported i'll get the extra bass i would like to achieve.
2003 EAP SVT #2752