If you want to move hot chicks hair with subs like Steve Meade Designs (SMD), then you are going to need to know what you need to do it. Its not simple, but with a combination of right things you can be doing cool hair tricks all the time and get girls to sit in your ride.
1) Get a bigger sub that has a larger cone. The bigger the cone is, the more easier it will be for the subwoofer to move air. An 18 inch subwoofer will sound deeper and move more air if compared against a smaller 10 inch sub.
2) Add multiple subs. The more you add, the more air is going to be pushed in your ride making hair tricks easier.
3) Build a low tuned ported box. Having your subs in a custom ported box turned around 30 HZ will move more air than a cheaply put together sealed box from walmart.
4) Ensure you have enough RMS power and an strong electrical system to back it up. Match your amplifier with the correct RMS power rating for your subs. The more power you run, the more the coils are going to be worked.
5) Run bass boosted songs. There are tons of them on YouTube to listen to on your car audio system. These have enhanced bass added to them to make them hit harder than normal versions of any song.