If your seriously thinking about a Vibe Blackair 12" dual 2 ohm sub, then in my opinion you cant go wrong, my sub if fully run in now and is performing very well indeed, the only thing I will say, is make sure your amp is upto the job, because this sub is very demanding at 550 watts RMS 1600 watts peak, it is sucking everything my Mutant MTOR1 mono block amp has to offers and that pumping out 400 watts RMS 800 watts peak, also bear in mind this is a SPL spec sub and requires a minimum input of at least 150 watts RMS... Personally I cant fault the sub, I am even considering buying another one, the sub produces endless amounts of clean crisp bass, and im sure you wont be disapointed with your buy...