The passive subwoofer is a new design, through excellent processing technology and high-quality raw materials, the performance of passive subwoofer up to a higher standard. We are perfect for every detail of the passive subwoofer, guarantee the quality level, so as to bring you the perfect product experience. FDB is a professional China passive subwoofer manufacturer and supplier, if you are looking for the best passive subwoofer with low price, consult us now!