之所以宝马汽车音响维修的价位高于家用音响，其主要原因是由于汽车音响的使用环境要比家用音响的使用环境恶劣得多。网络或电话沟通，就给你搭配方案（尤其是信誓旦旦自称很的），绝大多数是纯商业行为，只是卖汽车音响而按你的要求改音响
The main reason why the maintenance price of BMW car audio is higher than that of home audio is that the use environment of car audio is much worse than that of home audio. Network or telephone communication, to give you the collocation scheme (especially vow very much), the vast majority is pure commercial behavior, just sell car audio and change audio according to your requirements
在检查电路时，通常需求辨明元器件是左声道仍是右声道，将搅扰加这些元器件，通过改动平衡旋钮来改换扬声器发声就能够区分左声道仍是右声道的元器件不好。
When checking the circuit, it is usually necessary to identify whether the components are left or right channel. By adding disturbance to these components and changing the balance knob to change the speaker sound, we can distinguish whether the components with left or right channel are not good.
某一声道高音无声
A certain channel is silent
故障排除：先检查分音器的配线是否接通，然后用电表从分音器端去测量有没有声音，可能是错将喇叭线输入端接低音输出端。
Troubleshooting: first check whether the distributor wiring is connected, and then use a meter to measure whether there is sound from the distributor end, which may be wrong to connect the horn wire input end to the bass output end.
自己改装的话记得所有电源线无论正负极都要加保险丝、外套护管，所有过车架铁皮切口的地方套橡皮圈（非常重要，为你的车不自燃）。
If you refit yourself, remember that all power cords, both positive and negative, should be equipped with fuses and protective tubes, and all the places that pass through the iron incision of the frame should be equipped with rubber rings (very important, for your car not to ignite).
