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This forum has been set up to facilitate discussion of 1970s KEF speakers and drive units. The owner of the Forum has no connection with KEF Audio.
 
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  Topic: Uni-Fi
SaSi

Replies: 0
Views: 116

PostForum: Other speakers   Posted: Sun Apr 08, 2018 10:32 am   Subject: Uni-Fi
You may know that Andrew Jones, formerly with KEF, after a brief stint with Pioneer, moved on to ELAC.

I just saw they offer a new range of loudspeakers, sporting a concentric / coaxial midrange/t ...
  Topic: Replacement tweeters for R107: Matching
SaSi

Replies: 4
Views: 226

PostForum: KEF speakers   Posted: Sun Apr 08, 2018 7:36 am   Subject: Replacement tweeters for R107: Matching
What happened to the original tweeters? If they only have hardened / dried ferrofluid, that's a relatively easy fix that's totally feasible. And you keep the original "character" of the loud ...
  Topic: Calling SpeakerGuru: KEF Reference 103.4 - cooked B160's
SaSi

Replies: 5
Views: 309

PostForum: KEF speakers   Posted: Tue Mar 27, 2018 4:59 pm   Subject: Calling SpeakerGuru: KEF Reference 103.4 - cooked B160's
Just to bring an example, I re-created a pair of 107s only having the domes and original crossovers. I didn't have the boxes as the previous owner threw them away after a flood. Sad

I created draw ...
  Topic: The history, and perhaps future, of my 104 and 104ab
SaSi

Replies: 3
Views: 787

PostForum: KEF Speakers from the 1970s   Posted: Fri Dec 29, 2017 7:29 pm   Subject: The history, and perhaps future, of my 104 and 104ab
Hello, welcome and season's greetings.

I liked your post, up to the point where you started the discussion about breaking down the 104ab pair to make a smaller speaker pair.

I would first need ...
  Topic: Rubber surround is sliding
SaSi

Replies: 4
Views: 706

PostForum: KEF speakers   Posted: Mon Apr 17, 2017 6:57 pm   Subject: Rubber surround is sliding
They certainly look "unhealthy".

But check out the pictures here:
http://www.hifido.co.jp/KW/G0201/E/0-50/C10-50703-58643-00/
The deformation on the surround is almost visible in multip ...
  Topic: Actively driving a KEF R107
SaSi

Replies: 8
Views: 1470

PostForum: KEF speakers   Posted: Thu Feb 16, 2017 6:28 pm   Subject: Actively driving a KEF R107
Thanks for the KUBE curves. I have mk1.

I had that issue with bright treble before adding the KUBE. The parametric equalizer had been set for -3dB beyond 5kHz and that tamed it enough. Thought it w ...
  Topic: Actively driving a KEF R107
SaSi

Replies: 8
Views: 1470

PostForum: KEF speakers   Posted: Wed Feb 15, 2017 6:20 pm   Subject: Actively driving a KEF R107
If the KUBE is extending it's slopes to the midrange, it can be set before the bass and midrange power amps and take care of both ranges, leaving the treble alone to feed directly from the preamp to t ...
  Topic: Actively driving a KEF R107
SaSi

Replies: 8
Views: 1470

PostForum: KEF speakers   Posted: Tue Feb 14, 2017 8:34 pm   Subject: Actively driving a KEF R107
So you are saying, tri-amp, in effect, by splitting the crossover and drive each section alone, and avoid the active crossover stage.

That's an idea, however, if IIRC, I've read that the R107 main ...
  Topic: Actively driving a KEF R107
SaSi

Replies: 8
Views: 1470

PostForum: KEF speakers   Posted: Sat Feb 11, 2017 1:16 pm   Subject: Actively driving a KEF R107
I just added the KUBE to the amplification chain (removing the quick and dirty solution of the parametric equalizer I used) and it makes a huge difference. But it really strains the amplifier (2x110W/ ...
  Topic: Help & or suggestions on inherited kk3!
SaSi

Replies: 10
Views: 2199

PostForum: DIY with KEF drive units   Posted: Wed Jan 18, 2017 8:15 pm   Subject: Help & or suggestions on inherited kk3!
You can go the good quality heavy wood with braces and bitumen sheet damping. I have done that for a 200lt enclosure with 20mm high quality plywood, hardwood braces (3 across the height) and 9mm bitum ...
  Topic: Kef 104/2 with a sub woofer
SaSi

Replies: 5
Views: 1355

PostForum: KEF speakers   Posted: Thu Dec 15, 2016 8:40 pm   Subject: Kef 104/2 with a sub woofer
Obviously, if you have the sub, use it.

Regarding using the KUBE or not, there are those who find the op amps in most KUBEs offending and swap them for better ones or prefer to listen without the ...
  Topic: KEF Museum
SaSi

Replies: 19
Views: 14208

PostForum: KEF speakers   Posted: Thu Dec 15, 2016 7:44 am   Subject: KEF Museum
I got a response back:

We are working on content migration, during the period, you can visit http://kef.com/html/mx_es/explore/about_kef/museum/ to access the information. Sorry for inconvenience c ...
  Topic: Kef 104/2 with a sub woofer
SaSi

Replies: 5
Views: 1355

PostForum: KEF speakers   Posted: Wed Dec 14, 2016 9:13 pm   Subject: Kef 104/2 with a sub woofer
I don't have a pair of 104/2 but do have a functional pair of 107. Similar bandpass design.

Although it's not the same speaker design, the bandpass low frequency section is able to give a real hard ...
  Topic: KEF Museum
SaSi

Replies: 19
Views: 14208

PostForum: KEF speakers   Posted: Wed Dec 14, 2016 6:30 pm   Subject: KEF Museum
Yes, seems to be gone.
I contacted KEF in the UK to let them know that we hope it's just an update glitch.

Hope it comes up again soon.

Until then,
https://web.archive.org/web/20160316041224/ ...
  Topic: cantata with sp1054 and t-27
SaSi

Replies: 1
Views: 1680

PostForum: KEF Speakers from the 1970s   Posted: Sat Nov 05, 2016 9:29 am   Subject: cantata with sp1054 and t-27
B200 SP1054 + T27 with a passive BD139 give you the essentials for a KEF Calinda. Although the Calinda is a smaller box compared to the Cantata box.

DN18 is the proper crossover for the Corelli, wh ...
 
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