宁波正盛音响科技有限公司 / Ningbo Zhengsheng Audio Technology Co., Ltd. (ZHENGSHENG / huni)
正盛强调出厂前进行加速度、振动偏移等测试，保证批量一致性。整机厂可用同样指标做来料抽检与寿命评估。
Zhengsheng tests acceleration and vibration displacement before shipping for batch consistency. OEMs can use the same metrics for incoming QC and life tests.
体感是主观体验，但加速度/偏移可量化，便于对比型号与发现异常批次，减少售后异响与无力感。
询价时要求样品测试报告或可接受的抽检标准；量产锁定安装扭矩与垫片工艺。
Feel is subjective; acceleration/displacement make models comparable and catch weak or noisy lots.
Ask for sample test data or AQL rules; lock mount torque and spacer process in MP.