Kef ls50 meta cone cracking

[Edbostan]

Replacement is relatively easy apparently, 6 screws behind the logo ring on the outer surface of the face and then spade connects. Regarding the damaged drivers I am not expecting to see any visible damage as the speakers have played perfectly during the whole episode and without pointing out the damage you really wouldn't know there had been any . They sound as good as new or my ears have deteriorated to a point where I can't here anything different 😄🦻

You may have stumbled across a new cone design. All it needs for Kef to test it and incorporate it in the latest model.

 

[rayolight]

Final update to this thread,speakers arrived to day and fitted with no issues. All now working fine.
Would like to put on record my thanks and appreciation to Beverly and Andy at KEF, for accepting my comments in good faith, that I genuinely did not believe that I had overdriven the speakers and they had definitely not been thwacked. Andy was particularly surprised after suggesting I get a subwoofer, when I informed him I already had an SVS PB2000 sub on my system.
Anyway, all now working fine, hopefully no more hiccups in the future. Would like to thank all for your valued comments Even the ("It must have been thwacked") ones. Though if I had knowingly damaged the speaker I would never have broadcast it on a thread. Also like to thank Matt Spandl at Acoustic Energy for recommending the glue ,which worked really well 😀.

 

[Al ears]

Final update to this thread,speakers arrived to day and fitted with no issues. All now working fine.
Would like to put on record my thanks and appreciation to Beverly and Andy at KEF, for accepting my comments in good faith, that I genuinely did not believe that I had overdriven the speakers and they had definitely not been thwacked. Andy was particularly surprised after suggesting I get a subwoofer, when I informed him I already had an SVS PB2000 sub on my system.
Anyway, all now working fine, hopefully no more hiccups in the future. Would like to thank all for your valued comments Even the ("It must have been thwacked") ones. Though if I had knowingly damaged the speaker I would never have broadcast it on a thread. Also like to thank Matt Spandl at Acoustic Energy for recommending the glue ,which worked really well 😀.

Glad it turned out as it did for you in the long run and always good to see people named when they have been helpful

 

[landco]

I saw a similar problem with a burst diffuser on the kef q350 model..... in the Russian-language segment of YouTube

 

[Al ears]

I saw a similar problem with a burst diffuser on the kef q350 model..... in the Russian-language segment of YouTube

Please check the dates on these threads before you post.

 

[Stuart.W.D]

I saw a similar problem with a burst diffuser on the kef q350 model..... in the Russian-language segment of YouTube

The Q-series is experiencing problems too, 😔. I would appreciate it if you could provide me with a link to the site. Thank you.

 

[rayolight]

Just an update from my initial post in May of last year. New Kef's are working fine with same settings on my amp as of when my problem occurred. Can only conclude that there was a problem with the original cones.

 

[landco]

The Q-series is experiencing problems too, 😔. I would appreciate it if you could provide me with a link to the site. Thank you.

View: https://www.youtube.com/watch?v=z4kJ2aGGufs

 

[Stuart.W.D]

View: https://www.youtube.com/watch?v=z4kJ2aGGufs

Wow! He went for it, didn't he? If my LS50's speakers had blown, I would be aware that I was responsible. The driver issue on my speakers differs from that of the Russian guys. 😂

 

[landco]

I would not buy acoustics with coaxial speakers... impractical.

 

[nopiano]

I would not buy acoustics with coaxial speakers... impractical.

Don’t tell Tannoy who’ve been making them for decades. 😀

(I appreciate it may be a translation issue, but the word is loudspeakers, rather than acoustics. Acoustics is usually used to refer to the sound characteristics of a room or building)

 

[landco]

Coaxial speakers don't make much sense in home audio. Otherwise, this loudspeaker acoustic design scheme would displace others on the market



But if the speaker breaks down, there may be problems with repairs

 

[Roger_A]

Coaxial speakers don't make much sense in home audio. Otherwise, this loudspeaker acoustic design scheme would displace others on the market


But if the speaker breaks down, there may be problems with repairs

Why do they not much make sense in home audio? Please explain.

If it breaks down why should there be any more problems with repairs than with a conventional two driver speaker? Again, please explain.

If you're going to make sweeping statements then you need to explain what is the basis for them, such as proof or examples, or state if it is just your personal opinion or bias.

 

[landco]

Why do they not much make sense in home audio? Please explain.

If it breaks down why should there be any more problems with repairs than with a conventional two driver speaker? Again, please explain.

If you're going to make sweeping statements then you need to explain what is the basis for them, such as proof or examples, or state if it is just your personal opinion or bias.

try repairing a coaxial speaker and you'll see what I'm talking about.

As for saying that a coaxial speaker doesn't make sense in home audio, I already answered, but you didn't pay attention. In such cases, you should always pay attention to the situation in the audio market as a whole. The percentage of audio systems with a coaxial speaker is insignificant, and this fact is directly related to what I said above.

 

[clevs121]

Is it the left-hand speaker in that bottom picture?
Nothing to do with direct sunlight?
If it were a common problem, others would surely be reporting it 🤔

PS at least you've got two other pairs to switch to.

I had exactly the same problems Kef replaced them free of charge & guess what the new drivers have exactly the same problems...

 

[Gray]

I had exactly the same problems Kef replaced them free of charge & guess what the new drivers have exactly the same problems...

☹️
Makes you wonder how many others might have suffered in silence.

 

[Stuart.W.D]

I had exactly the same problems Kef replaced them free of charge & guess what the new drivers have exactly the same problems...

I have yet to repair my KEF Ls50 speakers. I might get around to doing it this summer.😅

It's unfortunate that the new driver is experiencing the same issue. Overall, it's discouraging. 🤯

 

[rayolight]

I have yet to repair my KEF Ls50 speakers. I might get around to doing it this summer.😅

It's unfortunate that the new driver is experiencing the same issue. Overall, it's discouraging. 🤯

I never really got to the bottom of the problem,Kef very kindly sent me two replacement speakers,which I fitted and they have been working fine ever since.The location they were in didn't get any direct sunlight, and they are now in a new room where there isn't any sunlight at all🙏🤞

 

[davidf]

try repairing a coaxial speaker and you'll see what I'm talking about.

As for saying that a coaxial speaker doesn't make sense in home audio, I already answered, but you didn't pay attention. In such cases, you should always pay attention to the situation in the audio market as a whole. The percentage of audio systems with a coaxial speaker is insignificant, and this fact is directly related to what I said above.

Tannoy, KEF, Ascendo, TAD, Mobile Fidelity, Elac, Fyne, Ubiq, Technics - and that's off the top of my head, there'll be more. Coaxial/dial-concentric speakers make a lot of sense, as they greatly reduces phase issues and generally improve imaging. They're ideal for near-field listening, and listening in smaller rooms.