许多单位由于设备老化而迫切需要更新，许多单位和个人来信来电咨询，现就一些共性的问题提供大家参考。首先要对现有的设备情况进行会诊：会诊的角度是根据实际情况进行检测，确定是否能继续使用。会诊要请专业音响师进行，根据会诊情况决定修理或更新。建议：从经济角度... Many units urgently need updating due to the aging equipment. Many units and individuals have come to inquire by telephone. We are now providing some references to some common problems. First of all, the existing equipment for consultation: consultation is based on the actual situation of the test, to determine whether to continue to use. Please consult a professional audio consultation, according to the consultation decision to repair or update. Advice: From an economic point of view