There is no hard or fast rule here. If you are more into sound quality one 10” in a sealed enclosure will be more than enough. If you want lots of bass do a 12” in a ported configuration. If power and space are not an issue, multiples are better than singles. You will gain 3db just by adding another sub (more cone surface area)...in theory anyway. However, spending money on a single quality sub versus two lower end speakers is always a better choice in my opinion. Unless you are strictly looking for huge bass, quality is always going to beat quantity in the car audio world.
I’ve always been a fan of 10s... I prefer the way they sound vs a 12. You give up some of the lower extension, but you get more punch. If you are not listening to rap exclusively you probably won’t notice much difference between the two. On the other hand, a double bass kick drum will generally sound faster, punchier, and more accurate played through a 10. Plus a 10 usually requires 1/2 to 1/3 the enclosure size as does a 12. If space or weight is a premium for you this is also something to consider.
I’ve always been a fan of 10s... I prefer the way they sound vs a 12. You give up some of the lower extension, but you get more punch. If you are not listening to rap exclusively you probably won’t notice much difference between the two. On the other hand, a double bass kick drum will generally sound faster, punchier, and more accurate played through a 10. Plus a 10 usually requires 1/2 to 1/3 the enclosure size as does a 12. If space or weight is a premium for you this is also something to consider.
