Prodigy Audio NB2-10D4 10" 350 Watt RMS Dual 4 Ohm SubwooferProdigy Audio NB2 10D4 10" 350 Watt RMS Dual 4 Ohm Subwoofer is a sound quality friendly entry level woofer built for shoppers who want clean bass, solid low end support, and a subwoofer that offers better features than you usually expect at this level. Sold by AudioSellerz. com, this 10" Prodigy Audio subwoofer is part of the NB2 Series, which Prodigy describes as a class leading first level line with features normally found in higher end products.