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What happened?
http://www.diyaudioprojects.com/Forum/viewtopic.php?f=11&t=6746
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Author:  Wuh [ 23 Mar 2020, 10:00 ]
Post subject:  What happened?

A few months i replaced this on a set B&O RL140 speakers. Did not used them anymore because there was something not right i could hear. I left it untill 2 weeks ago. found the original foam rings and today i replaced the bad one. I could just pull the old one off like it was never glued. The other 3 are just fine. What does the wave say? I'm pretty sure i connected it the right way + - It's cheap Chinese stuff, glue and ring. But what happened? why only on 1 out of four woofers? This thing had a serious beat as you can see.

Author:  ILoveHiFi [ 23 Mar 2020, 19:47 ]
Post subject:  Re: What happened?

If something dosen't sound right, normally its the voice coil touching the sides of the magnets.
Highly do not recomend re coning anything unless you have the proer tool to set in the voice coil.

Also be patient and allow for 24hours to dry up before you proceed after gluing the voice coil

Author:  ILoveHiFi [ 23 Mar 2020, 20:22 ]
Post subject:  Re: What happened?

If you break the cone side, that means you've purchased a cone side that is uncompatable, for subwoofers that have very high excursion possible you neeed special spiders and cone sides to allow the high excursion (high length in movement in voice coil and cone).

Author:  Wuh [ 27 Mar 2020, 06:14 ]
Post subject:  Re: What happened?

Thanks for your reply. Sorry for my late response. Somehow notifications doesn't work.
The glue i used was a few months old and i could tell it did not need much time to connect anymore.
As i have now 8 of that foams i thought it was worth a try to waste one. The original foams fit so good you can center it at once with the already thickened glue. And it worked! I don't believe anything is damaged because the sound is as it should. In the B&O speaker the outer ring is pressured down to the chassis so when i centered it right thats where it stays. The inner ring seems to holding. Next week or so i go get it apart again to see if there is visual damage to be sure but for now the speaker is joining the fun with his brother speaker on the other side very well :P

If there might be something wrong with the coil because of my hard approach i want to find out. Don't know why but i start to love the sound of that speakers more and more... If i had the money back in time i still would not have bought them because of the demanding design. But further in time i enjoy the sound. Have a nice Beocentre from 1972-74 waiting to be restored.

Author:  ILoveHiFi [ 29 Mar 2020, 08:49 ]
Post subject:  Re: What happened?

Sometimes cone sides do break if they are deffective, but I think its very rare for this to happen.

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