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濟南汽車音響改裝后汽車音響在發動機沒點火一切正常，但是一點火后隨著發動機轉速越大哨聲越大的情況，那么出現這種問題是什么原因呢？

1、濟南汽車音響改裝http://www.szanyuda.com/介紹造成這種現象的真正原因是從主機到低音炮的信號線的地線開路了，或者有些主機的RCA輸出的信號地和主機的地線是隔離的，可以用萬用表量一下主機外殼和RCA輸出插座地是否相通，如果不通你可以將信號線插頭的地端直接碰到主機外殼看看，噪聲是否沒有了，然后用兩根柔韌一點的線將信號線插頭的地連接到主機外殼上，注意一定要連在主機外殼上，不然接到別的地線還是有一些微弱的噪音。
Jinan car audio conversion introduces the real reason for this phenomenon is from the host to the subwoofer signal lines open ground, or some of the host's RCA output signal ground and the ground is isolated from the host, you can look at the amount with a multimeter host shell and RCA output jacks to whether or not the same, if you can not make sense of the signal cord host shell hit the ground terminal directly to see if there is no noise, and then a little flexible cable with two signal lines connected to the plug host shell, attention must be connected to the host shell, or received other ground still has some faint noise.

2、濟南汽車音響改裝http://www.szanyuda.com/介紹造成這種現象還有一種原因可能是所用的信號線質量太差，過段時間地線自己斷開了，這種情況換一套好些的信號線就可以解決了，盡量選擇雙芯的屏蔽線和雙絞線。
Jinan car audio conversion introduces Another reason for this phenomenon may be used by the poor quality of the signal line, ground yourself off over time, and this situation is better for a set of signal lines can be resolved, try to choose dual-core shielded cable and twisted pair.