Jarvista said:
or this one?

Infinity: PERFECT 12 VQ - 12" subwoofer

Me got one of those and although I'm no expert , I found it much better than a Kicker L7 solobaric it replaced:funk:

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Right thanks to everyones comments, i've decided to go for an alpine SWR-1242D. I plan to wire it upto my amp so it sees it as a 2ohm load. I've chosen this one mainly because it's within my budget and i've heard alot of good things about these subs. Has anyone had any experiences with this sub?