Shenzhen Plack Audio Co.,LTD (Original name Shenzhen Yueyun AudioCo.,LTD) was founded in 1994, is a professional manufacturer ofhi-end speakers. Our factory size is 14000ã¡, it's a beautifulmodern factory. Solid Technology, innovative research, strongdeveloping ability, advanced production facilities, full testingequipments, all these assure us to be a trustful manufacturer ofhi-end speakers in the past 20 years. We achieved ISO9001:2008 fromSwitzerland SGS, and well managed our factory based on this system.The percentage of R