This dual ports open sub from front is it acceptable as technology? Ported sub with 2 holes.\nThe question goes sealed vs ported sub maybe now. To my ears ported sound like hummer bass and it has a tale in sound(like an echo)and its great in movies. Sealed is more clean bass, more for music?\n\nSome subs are designed so you can seal one or both ports and flip an eq switch for the best response. Your room still plays a critical role, tho. Sealed subs can work well too but have more challenges.