Vibe Pulse 12" Car Audio 900w Subwoofer Sub Stand Alone Bass Enclosure - No Amp

A : An active enclosure is an all in one solution where the subwoofer, amplifer and enclosure are all in one single unit making installtion easy and compact. A passive enclosure is a subwoofer and enclousre without an amplifier, these are often louder than an active enclosure but require a seperate amplifier to power them.