SP AUDIO SP15X PLAY 20HZ WITH 1 SP9000D !!! DO YOU LIKE LOW FREQUENCY? SP15X CAN DO IT !!!

QUICK TEST WITH 1 SP15X AND 1 SP9000D IN VENTED BOX. AFTER OUR CLIO VIDEO EVERYBODY ASK ABOUT THIS SUBWOOFER SO WE DECIDE TO SHOW HOW IT CAN PLAY VERY GOOD 20HZ. YOU LIKE LOUD AND LOW FREQUENCY MUSIC??? SP15X IT’S WHAT YOU NEED!!!