They are 24531Hi Charlie,
What are the serial number of your kans ?
Thanks David.If they aren’t rubbing then the only potential issue is stiffening of the rubber surrounds.
This can be treated:
https://www.diyaudio.com/forums/multi-way/243413-kef-b139-sp1044-fs-43hz.html
But be aware you May prefer the snappier presentation of the harder suspension
Aging tweeters present more issues especially where dried ferrofluid is present.
I mentioned the difference between the b110a&b because they are more different than people realise. As a mid/bass the A is preferred, as a mid the B is superior. Also they are actually a different chassis shape and one will not fit perfectly in a cutout made for the other.
Nothing is wrong with them. I was just curious if they were worth replacing. I will just continue to enjoy my music through them as they are.Having faffed about replacing drivers in the past its a doddle to do but a waste of time unless you have an identical driver to fit or a better one.
Whats wrong with the driver?
KEF model T27 was NEVER available with ferrofluid...If they aren’t rubbing then the only potential issue is stiffening of the rubber surrounds.
This can be treated:
https://www.diyaudio.com/forums/multi-way/243413-kef-b139-sp1044-fs-43hz.html
But be aware you May prefer the snappier presentation of the harder suspension
Aging tweeters present more issues especially where dried ferrofluid is present.
I mentioned the difference between the b110a&b because they are more different than people realise. As a mid/bass the A is preferred, as a mid the B is superior. Also they are actually a different chassis shape and one will not fit perfectly in a cutout made for the other.