We cant tell you, we cant ball park it. You have the resonant frequency of your vehicle, the box, the ports, the **** in your car, placement. There is no way to estimate.
No the NS v.1 and the DP are completely different. This was just a rumor going around for a while, both Nick and Jacob have said its wrong.
dude, i doubt your going to hit 150's with one 18 on 2K without building a burp box. Youll need more cone area or more power. Unless you compete every day then buy something that will make you happy and stop worrying about numbers that you dont understand.