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Tweeter Speaker Repair

By Jestine Yong on April 11, 2020

Customer sent to me this set of speaker with the complaint of intermittent no sound from the tweeter speaker. In the above photo, the arrow pointed to the tweeter speaker that was having problem. Below photo is the tweeter speaker that I had removed:

It is easy to check if the tweeter speaker is working or not. Simply use your Ohmmeter and measure the two points of the speaker connector.

A good one will show Ohm’s reading and a bad one will have no reading and an intermittent one will occasionally show some readings. The one that I had checked had intermittent reading and it needs replacement.

I got a new replacement for this tweeter speaker and when everything was fixed I checked the Ohms reading and it shows 7.1 Ohm which means it was good. If the Ohms is too high say 500 Kilo ohm also indicate problem with the speaker coil.

The more you test on the tweeter speakers the more you will know about the Ohms value. See the photos below:

Finally the tweeter speaker was fixed back to its original location and the sound was so good.

Conclusion- Troubleshooting tweeter speaker is pretty straight forward. Just by checking on the coil resistance you will have a rough idea if it is good or bad. Of course you need to check on other parts too like the cone paper if it tear or not and etc.

This article was prepared for you by Suranga Bandara who owns an Electronics repair shop in Anuradapura, Sri Lanka.

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Speaker Repair

9 Comments

Albert van Bemmelen

April 11, 2020 at 2:47 pm

Fixing speakers by repairing a bad coil is hard to do which I know is often done in specialized countries like probably yours. Like fixing bad transformers by rewinding them in India is common. Just replacing bad speakers by a new loudspeaker in my country is the only option left. Like replacing the bad Westra 160-1324 4 ohm Subwoofer speakers in my Elac 2-way 80 Watt peak speaker boxes I was fortunate to find second hand on eBay. (Because universal replacement speakers are often mid-toners going much higher upto about 7KHz instead of up to 45-4KHz at 88dB in original Westra Subwoofers which simply sounds much better).

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- Yogesh Panchal
  
  April 15, 2020 at 3:44 pm
  
  Albert, you are right in India rewinding work is common. We have facility of many small scale crash course centers in every states and city of India like ,Motor rewinding,Electrical cabling work ,fridge,AC,Washing machine. Mechanical works,Automobile repair and electronics repair and many more......field for empowering rural peoples and for those who are not educated but skilled peoples.
  
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Ivan

April 11, 2020 at 5:59 pm

Thanks

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Parasuraman S

April 11, 2020 at 6:46 pm

It is not clear to me whether you replaced the coil or replaced the drive (speaker) itself. Anyhow, good work!

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Gassan Ali

April 12, 2020 at 3:54 am

Thanks for the video! Your simple explanation of how to test the coils of speakers will be very helpful for me in the future.

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Yogesh Panchal

April 15, 2020 at 3:51 pm

Good job! suranga
luckily you got a new replacement for this tweeter speaker or else this speaker could have gone to earth fill..................

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Fernando andales

April 18, 2020 at 2:57 am

Have a good day mr.yong,
Thank you very much for wonderful articles.i'm enjoyed reading to help my career in electronics.
May be next time we will purchase this ebook to support and i love it.thank you very much.

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- Jestine Yong
  
  April 18, 2020 at 12:31 pm
  
  Hi Fernando,
  
  You are welcome and I need to thanks Suranga for the article contribution also.
  
  Jestine
  
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Christopher Massie

April 30, 2020 at 12:21 am

This is called a dome tweeter which has a replaceable diaphragm with the voice coil attached . The cone/spider/voice coil are all one unit making it simple to repair. I did not see any burn marks on the voice coil (which would indicate shorting of VC or amp malfunction) which leads me to believe that the problem is a break in a lead or somewhere in the coil winding itself - or a lead/coil wire that is in the process of breaking since the the continuity test is intermittent. The voice coil gap tolerance (between the pole piece and magnet which the voice coil rides in) with the voice coil in place is in the thousandths of an inch. Therefore it is a good practice to take a piece of masking tape doubled over (sticky side out) and run it around inside the voice coil gap to remove ALL debris which may be in there before reassembly. Debris in the VC Gap is one of the biggest causes of speaker failure especially if it is metallic debris. Always do this before installing the voice coil, and tape over the gap if you are doing any further cleaning or work on the speaker so nothing gets in there after you clean it.
Great job Suranga!

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