What kind of capacitor do i need?

I have a 10 inch alpine type r, in a really old car, but i'm getting another one, but i'm waiting until i get my other car. Not puttin 2 type r's in this old *** car....So my question is basically about what capaciter i should use for two 10" type r's 1000/2 amp....how many farads and ****, i dont know anything about them