TradeVerify We are a manufacturer of sound system such as subwoofer, woofer, car speaker, home theater, speaker box, PA speaker since 1992. We have the authorization of ISO9001-2000 for many years. At present, we have an area of 30,000 square meters, of which 10,000 square meters is building. Our products are sell well in many countries and area such as USA, UK, Germany, Malaysia, Indonesia, Israel, Colombia, Korea, Mexico, France, Egypt, U.A.E, etc. Welcome the worldwide customes to establish business relations with us.