Hey I'm looking to buy a single zcon for now but plan on adding another eventually. I want to run it on a crescendo 3500kw amp, and will upgrade to a 200 amp alt and a yellow top optimal. Is one enough? My car was just totaled and ruined my old setup. So now I'm buying a new car. Haven't decided exactly what car Im getting. But I know for sure I am getting a big car. Maybe an explorer. Most likely an explorer. So I'm wondering would you suggest a 15 or an 18 zcon