For woofer 18, everyone has different special concerns about it, and what we do is to maximize the product requirements of each customer, so the quality of our woofer 18 has been well received by many customers and enjoyed a good reputation in many countries. HONGCHANG(CHANGZHOU) ELECTRONIC CO.,LTD woofer 18 have characteristic design & practical performance & competitive price, for more information on the woofer 18, please feel free to contact us.