Passive subwoofers require a separate amplifier for power, which is useful if you plan on updating your equipment down the road. Inside the cabinet, passive crossover components split the frequency spectrum into distinct bands, which are then driven by an outside source. If you already have a quality amp and just need speakers, it’s probably smarter to go the passive route. IDJNow is proud to carry passive subwoofers from Electro-Voice and DAS Audio. Not sure which model to purchase? Our well-versed staff is happy to recommend the perfect sub for your venue or traveling production. To learn more, chat with us live, call 1-800-355-7746, or stop by one of our showrooms.