Asking What is the "best" is a waste of time. There is NO "best" . Best to me, and best to you are totally different.

Please post all relevant info about your question.

example of a bad question
Most of these questions have simple answers, but because of a lack of information in the original post nobody knows how to answer it. What subs? what amp? what car? ported or sealed? how many subs? etc etc.

Not trying to flame anyone, Im just trying to make this tech section a little more efficient.

Good question:

This gives us tech heads some information to go with.
We can google up the amp info and see that its X watts rms, then suggest subs that need a smaller box, or a single sub with the rms rating to match.
And we know that you dont want to dump a ton of cash on it, so we can try to figure out a sub that will optimize the amp, and not be overkill for the speakers running off the head unit.

See? Makes our lives, and your lives that much easier.

 

and now no one will ever post in AHQ nemore THANKS JESSE