Ningbo Yinzhou Guanyuan Electronic Co.,Ltd. is a professional manufacturer of loudspeakers. Our Company specializes in the development and production of 25-100 core diaphragms for stage tweeters, acoustic vibration plates, PA drive heads. We strictly control the quality of all products, ensuring that each product meets the loudspeaker inspection standard. We develop various kinds of products absorbing the essence of similar products at home and abroad. Products are more perfect, and the quality is particularly high. We will maintain and achieve breakthrough to ensure continuous quality optimization....