I m wondering if I should go wth two 10's or one 12. It's either two Infinity Kappa Perfects 10.D or one Infinity Kappa Perfect 12.1D. I m on a 600 dollar budget also. One ten is $150 a piece and the twelve is $130 a piece, but it use to be $180 though. So what I m wondering is why the 12 inch is cheaper than the 10 inch.
Maybe they're trying to phase out older model in 12". Unless you're going to purchase higher powered 12", I'd go with 2 10". Let's say the 10" subs are 150w rms. That's 300w rms combined. To replace that with one sub, you will need 300w 12" sub. Make sure you build/buy the box according to the manufacturer's spec.