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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: KEF KIT3 Servicing
habrune

Replies: 16
Views: 13618

PostForum: KEF Speakers from the 1970s   Posted: Wed May 06, 2015 12:49 pm   Subject: KEF KIT3 Servicing
Thanks for the warning! Wow, nearly solid mercury....
  Topic: KEF KIT3 Servicing
habrune

Replies: 16
Views: 13618

PostForum: KEF Speakers from the 1970s   Posted: Sun May 03, 2015 11:05 am   Subject: KEF KIT3 Servicing
Thank you all very much for the variety of tips. I'll try on some remote parts of the rim first (having been warned loud & clear). Dot 4 brake fluid is at hand, as I'm changing the brake leads of ...
  Topic: KEF KIT3 Servicing
habrune

Replies: 16
Views: 13618

PostForum: KEF Speakers from the 1970s   Posted: Sat May 02, 2015 9:17 pm   Subject: KEF KIT3 Servicing
Hello DarrenHW,
Interesting project. You mentioned you applied some 'rubber restorer', could you please share what you use to restore the rubber? I'm stuck with aging B139's, the rubber loses its wea ...
  Topic: Concerto Crossovers
habrune

Replies: 12
Views: 7999

PostForum: KEF Speakers from the 1970s   Posted: Thu Apr 16, 2015 4:36 pm   Subject: Concerto Crossovers
Hi Tristan,
I completely agree with Kimmo.
I worked trough subsequent versions of the B139/B110/T27 XO layout.
Tried to find the indeed mysterious AusKEF version, the supposed end to all queries.. ...
  Topic: Atkinson Maxi-Line?
habrune

Replies: 0
Views: 2064

PostForum: DIY with KEF drive units   Posted: Thu Apr 16, 2015 3:50 pm   Subject: Atkinson Maxi-Line?
I wonder if anyone has spoken to P.Atkinson / or knows about the once mentioned Maxi-Line by P. Atkinson? He mentions in his Mini-Line article (HiFi News & RR nov 1978) this Max-Line: "almos ...
  Topic: Atkinson MiniLine TL speakers - crossover advice please?
habrune

Replies: 5
Views: 4202

PostForum: DIY with KEF drive units   Posted: Wed Dec 17, 2014 8:34 pm   Subject: Atkinson MiniLine TL speakers - crossover advice please?
Hi surv1v0r,

I have to admit I skipped the complex building instructions. Way too much work. I build them from 18mm ply (outside) and 6mm inside, and glued (the carefully cut to size) panels cold o ...
  Topic: Atkinson MiniLine TL speakers - crossover advice please?
habrune

Replies: 5
Views: 4202

PostForum: DIY with KEF drive units   Posted: Sun Nov 30, 2014 9:32 am   Subject: Atkinson MiniLine TL speakers - crossover advice please?
I've build several versions of the B110A /T27 combi:
In a closed cabinet 5 L with LS3/5a XO: High Q bass somewhat loud, not so deep, indeed somewhat tiring, but good mids, on level with overall resp ...
  Topic: T27 6535 versus T27 SP1032
habrune

Replies: 22
Views: 20899

PostForum: KEF Speakers from the 1970s   Posted: Fri Nov 21, 2014 12:13 pm   Subject: T27 6535 versus T27 SP1032
Proffski, to be honest the old ones where in the Cambridge kit, with Coles on top. So that might have sweetened them up. Dazzled by your T27 application! I'd like the rest of the scheme, I never used ...
  Topic: T27 6535 versus T27 SP1032
habrune

Replies: 22
Views: 20899

PostForum: KEF Speakers from the 1970s   Posted: Wed Nov 19, 2014 12:12 am   Subject: T27 6535 versus T27 SP1032
FWIW, owned some (say 5 pairs) SP1032's all within the 7-8 Ohms range DC, and fs between 1100-1250 Hz. I had one pair 6535, fs indeed around 900 Hz, but DC resistance both between 4-5 Ohms. Some doubt ...
  Topic: Cores for XO Inductors
habrune

Replies: 7
Views: 5217

PostForum: DIY with KEF drive units   Posted: Mon Nov 17, 2014 9:45 pm   Subject: Cores for XO Inductors
Many years ago I compared Philips 3,5mH inductors with laminated closed cores to ferrite Intertechnik HQ58/46 3,3mH coils. The Intertecchniks showed consistendly 3.3mH across different measuring inst ...
  Topic: Auskef crossover layout
habrune

Replies: 10
Views: 5860

PostForum: DIY with KEF drive units   Posted: Mon Nov 17, 2014 9:23 pm   Subject: Auskef crossover layout
Proffski and Terry, thanks again. Took a while to respond (work/ sign up to diyaudio). The diyaudio thread is indeed close to what I've tried, thanks for that one. I tried B139/B110B/T27 in CS7 crosso ...
  Topic: Auskef crossover layout
habrune

Replies: 10
Views: 5860

PostForum: DIY with KEF drive units   Posted: Thu Nov 06, 2014 7:51 pm   Subject: Auskef crossover layout
Proffski, it is great to see so much helping and so quick. Thanks! No, I have all the plans (apology for my Dutch English), my question is only for the mid section of the AusKEF (Falcon 53) XO. For th ...
  Topic: Auskef crossover layout
habrune

Replies: 10
Views: 5860

PostForum: DIY with KEF drive units   Posted: Thu Nov 06, 2014 3:21 pm   Subject: Auskef crossover layout
Speakerguru, thanks, I tried in another topic, see http://www.hifiloudspeakers.info/speakertalk/viewtopic.php?t=1622, but to no avail. I learned there that the Australian import manager had asked KEF ...
  Topic: Auskef crossover layout
habrune

Replies: 10
Views: 5860

PostForum: DIY with KEF drive units   Posted: Thu Nov 06, 2014 11:27 am   Subject: Auskef crossover layout
One clear question: does anyone on this forum know the exact component values in the mid-branch for the B110A in the AusKEF 18dB crossover for B139/B110A/T27? I want to update my Webb with Cambridge R ...
  Topic: B110A 3rd order 3-way crossover
habrune

Replies: 10
Views: 8821

PostForum: DIY with KEF drive units   Posted: Mon Nov 03, 2014 7:45 pm   Subject: B110A 3rd order 3-way crossover
Wow! Great speakers. What appeals is the strict black form without any frills and frippery, aesthetic golden shine on the B139 (after the bottle possibly perceived as sunset on a strange planet), 'jus ...
 
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