Mha Posted September 8, 2011 Report Share Posted September 8, 2011 Im getting a dc xl 12 on monday that I got from ebay. Guy said it was in good condition but who knows. Any ways I dont have a multi metter so cant check that way. But I remember seeing a video on youtube that said you can check voice coils with a small battery, any truth? I dont recall if he used a AA or a 9v but he said if the cone moves when you hook it up your good if not the its blown. I cant seam to find the video anymore so I cant double check Quote Link to comment Share on other sites More sharing options...
RandyAudio Posted September 8, 2011 Report Share Posted September 8, 2011 You can use 12v from your car but mainly to test polarity. You can use it both ways and one should go in and the other make the cone move out. But some won't have problems till played by an amp. But yes you can test it a sub just needs a little more then a 9 volt battery. Move the cone by hand if it's crunchy sounding or gritty as it moves then it's done for. Quote Link to comment Share on other sites More sharing options...
GoodGuySlide50 Posted September 12, 2011 Report Share Posted September 12, 2011 Im getting a dc xl 12 on monday that I got from ebay. Guy said it was in good condition but who knows. Any ways I dont have a multi metter so cant check that way. But I remember seeing a video on youtube that said you can check voice coils with a small battery, any truth? I dont recall if he used a AA or a 9v but he said if the cone moves when you hook it up your good if not the its blown. I cant seam to find the video anymore so I cant double check RandyAudio is incorrect in two respects: Using your car battery to check for continuity will impose on the entire speaker to an unnecessary degree... great way to open circuit or warp the voice coil if applied for more than a microsecond. He also proclaims that a 9v battery (household type he seems to be implying) is potentially incapable of this task. In actuality even a tiny 3v watch battery is effective and far safer- if an ohm meter is not at hand. Quote Link to comment Share on other sites More sharing options...
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