喇叭小知识:喇叭出厂前测试下面由beat365正版唯一官网来一一为您解答:1.纯音测试(pure-tone test):将生产过程中有可能产生的杂音产品区别出来,确保良品交付Pure sound test: Finding the murmur speakers that was produced in production process, finally ensure all delivery goods will be OK.2. 性能测试(Performance):确保每批产品参数平衡、标准、