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近日，俺得一宝：
但这高音喇叭没标注正负极，对于如何区分正负极，中国人这样说:
1)用指針萬能表的直流50μA檔，接單元+/- 極，按壓單元的紙盆或震膜，如指針順時針方向擺動時，紅表筆為- 極，黑表筆為+ 極，指針往逆時針方向擺動時，紅表筆為+ 極，黑表筆為- 極
2)其实不用试来试去的，我辨别的方法是看音圈绕线方向。 从音圈上面看，如果是顺时针的，那么引出线（绕线末端）就是负极。 反之，从音圈上面看，如果是逆时针的，那么引出线（绕线末端）就是正极。 所有普通的音圈都可以这样判断。
鬼佬这样说：
Method #1 (意思是接线柱小的是负极）
Most speaker terminals will have one terminal smaller than the other. The smaller terminal is most often the negative terminal (as seen below). If you are still hesitant and MUST be sure, consult method #2.
Method #2 （意思是用1.5V电池测试）
To be absolutely sure of which terminal is positive and which is negative, we will use a 1.5 v battery to have the speaker react as though it is playing music.
* special note * do not use any more than 1.5 v as it may damage the speaker coil
As we know, batteries are marked positive, negative, or both ... we will use this to our advantage when hooking up the battery to our speaker.
To start the process, temporarily attach a short piece of wire to each terminal of the speaker (be sure to either use wire that is marked, or wire of differing colours to help determine which terminal is which).
In our example, we used standard speaker wire which is "polarized" (one wire is made of copper and the other is made from tin .. interestingly, this serves no electrical purpose)
Once you have connected the wire to your speaker, proceed to briefly touch the free ends of the wire to the battery terminals (as shown below). In some cases, extended contact with the battery has caused cancer of the voice coil (ie. blown speaker)
If the speaker moves OUT when the battery is first connected, the battery is connected in proper alignment. Be sure to take note of which wire is connected to the positive terminal of the battery as this is your speaker's positive terminal.
其实上述办法对我这个高音喇叭无效，各位有什么办法可以区别高音喇叭的正负极吗？
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IP卡
狗仔卡
发表于 2012-12-26 21:18
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