Installation of active linear array system For information on pricing, please use WhatsApp, Zalo. WeChat synchronous contact us: 86 18902557150 Sandy Audio is a factory and terminal supplier, and we have been in the professional audio industry for 28 years. We have a pursuit of sound quality and stability, and possess technical capabilities in product development, system construction, and tuning. We sell separate products and complete speaker systems. OEM buyers, distributors, wholesalers, and l