共监狱用，音频矩阵牌子不知道，已用在重庆市某监狱使用，方便效果很好-with a total prison, audio matrix brands do not know, we have spent in a prison in Chongqing Municipality used to facilitate good results

富豪汽车音响资料，适合各种富豪汽车音响使用-Regal car audio information on a variety of suitable Regal car audio use