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ebf
Intermediate Contributor 25+
Joined: 08 Jun 2020
Posts: 25
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 Posted: Sat Jun 13, 2020 10:48 am Post subject: KEF 107/2 metal-dome tweeter and ferrofluid |
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Is the tweeters in 107/2 a metal dome version of the T133?
Does the metal dome version need to change ferrofluid as with the textile dome versions?
I can see how the ferrofluid can vapor out from the textile dome, but metal dome.....
Toughs and experiences are welcome!  |
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speakerguru
Über Contributor 1000+
Joined: 18 Nov 2005
Posts: 1192
Location: Green Hut, Tovil
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| Posted: Sat Jun 13, 2020 2:48 pm Post subject: Re: KEF 107/2 metal-dome tweeter and ferrofluid |
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| ebf wrote: | | Is the tweeters in 107/2 a metal dome version of the T33? |
yes
| ebf wrote: | | I can see how the ferrofluid can vapor out from the textile dome, but metal dome..... |
Only the dome is metal. The surround is cloth AFAICR so will still allow the f/f oil to evaporate, albeit more slowly. |
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ebf
Intermediate Contributor 25+
Joined: 08 Jun 2020
Posts: 25
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| Posted: Sun Jun 14, 2020 10:02 pm Post subject: |
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Thanks for the reply speakerguru!
That would make sense... |
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ebf
Intermediate Contributor 25+
Joined: 08 Jun 2020
Posts: 25
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| Posted: Thu Jan 14, 2021 1:16 pm Post subject: |
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And for the future ppl wondering...
The surround is of some sort of polypropelen/plastic material - no clothing.
So, after 24 years, opening up the tweeters, one had about 1/3 of the ferrofluid left, and the other had about 1/5. There was dried ferrofluid to be removed, but these where the best looking ferrofluid tweeters I have seen from KEF from that era
Cleaning them up, refilling FF, they sound more pleasant, less sharp in the mid range, and they are a bit clearer/detailed and more airier in the top. |
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