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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: 1950s speaker demonstrations by Briggs, Cooke and Walker
roberte

Replies: 0
Views: 2002

PostForum: Other speakers   Posted: Thu Jan 20, 2011 1:56 pm   Subject: 1950s speaker demonstrations by Briggs, Cooke and Walker
There's a thread over on the [url=http://www.harbeth.co.uk/usergroup/showthread.php?1114-The-professional-way-to-evaluate-loudspeakers]Harbeth user group at present which takes as it's starting point ...
  Topic: KEF and PMC
roberte

Replies: 11
Views: 4988

PostForum: Other speakers   Posted: Sun Jun 13, 2010 7:25 pm   Subject: KEF and PMC
yes, in theory part 2 is here: http://www.pmc-speakers.com/company/index.php?mode=who_we_are but the links are broken
  Topic: KEF and PMC
roberte

Replies: 11
Views: 4988

PostForum: Other speakers   Posted: Sun Jun 13, 2010 5:51 pm   Subject: KEF and PMC
Some may have seen it before, but this is an interesting article which refers to the link between KEF and the founding of PMC - also the PMC founder's KEF collection.

http://www.pmc-speakers.com/do ...
  Topic: How did KEF progress after Bextrene?
roberte

Replies: 1
Views: 2962

PostForum: KEF speakers   Posted: Thu Apr 08, 2010 12:11 pm   Subject: How did KEF progress after Bextrene?
Prompted mainly by the fact that I have recently added a pair of early Harbeths to the speaker stash I started wondering what the development process at KEF had been in the late 80s - early 90s.

Af ...
  Topic: JR149 improved x-over type 24 (8R 7W res in particular)
roberte

Replies: 9
Views: 5186

PostForum: Other speakers   Posted: Tue Feb 16, 2010 11:15 am   Subject: nothing's ever simple is it?
Have had to do a bit of reading on what an L-pad is and does, am also slowly coming to grips with what effect it's impedance has on the filter before it - slowly mind.

Anyway, having started out wi ...
  Topic: JR149 improved x-over type 24 (8R 7W res in particular)
roberte

Replies: 9
Views: 5186

PostForum: Other speakers   Posted: Tue Feb 09, 2010 5:08 pm   Subject: JR149 improved x-over type 24 (8R 7W res in particular)
R2 will still be using power though won't it, it will be turning current into heat?
  Topic: JR149 improved x-over type 24 (8R 7W res in particular)
roberte

Replies: 9
Views: 5186

PostForum: Other speakers   Posted: Tue Feb 09, 2010 4:29 pm   Subject: JR149 improved x-over type 24 (8R 7W res in particular)
schematic from Graham's site, hope he doesn't mind - will remove if anyone would rather it weren't here

http://www.jr149.pwp.blueyonder.co.uk/T24.2.jpg

My knowledge of circuits isn't that good, ...
  Topic: JR149 improved x-over type 24 (8R 7W res in particular)
roberte

Replies: 9
Views: 5186

PostForum: Other speakers   Posted: Tue Feb 09, 2010 2:35 pm   Subject: JR149 improved x-over type 24 (8R 7W res in particular)
Sorry, not sure I understand there Colin.

I have already removed the extra link which, I assume, takes out the 22R and means there is no extra attenuation of the T27.

You seem to be saying that ...
  Topic: JR149 improved x-over type 24 (8R 7W res in particular)
roberte

Replies: 9
Views: 5186

PostForum: Other speakers   Posted: Sun Feb 07, 2010 8:25 pm   Subject: JR149 improved x-over type 24 (8R 7W res in particular)
Recently upgraded to a pair of Graham Hartle's x-overs in my recently acquired JR149s and in general the results are very nice.

I can't helping feeling though that the treble detail is now just lac ...
  Topic: JR-149
roberte

Replies: 24
Views: 23815

PostForum: Other speakers   Posted: Sun Jan 17, 2010 5:55 pm   Subject: JR-149
As I've just acquired some 149s I thought I'd re-open this thread.

Firstly: they are gold logo with a fuse in the (circular) cross-over and paper stickered serial numbers in tact on the bases (same ...
  Topic: What should be my next pair of Kefs?
roberte

Replies: 31
Views: 15433

PostForum: KEF speakers   Posted: Sun Jan 17, 2010 5:32 pm   Subject: What should be my next pair of Kefs?
Foam has long since gone and they have been used as a pot/candle stand at some point - nothing serious though.

Functionally they seem fine; got them playing now.

Given that the Kefkits use the s ...
  Topic: What should be my next pair of Kefs?
roberte

Replies: 31
Views: 15433

PostForum: KEF speakers   Posted: Sun Jan 17, 2010 12:13 pm   Subject: new KEFs - kind of
Well as it turned out my next pair of Kefs are:

JR149s

Speakers I really wanted way back when they were new, but couldn't afford.

Picked up a pair locally and they are really rather good soun ...
  Topic: Falcon Acoustics
roberte

Replies: 1
Views: 3015

PostForum: DIY with KEF drive units   Posted: Thu Jan 14, 2010 5:47 pm   Subject: Falcon Acoustics
Excellent news - thanks for the update.
  Topic: New Year's Eve
roberte

Replies: 5
Views: 2774

PostForum: KEF Speakers from the 1970s   Posted: Sun Jan 03, 2010 8:52 am   Subject: New Year's Eve
as well as a Quad 606 to upgrade to 909 specs

Quad 707 & 909 amplifiers are cold and lifeless in comparison to the 606, as they use different output transistors requiring higher frequency suppr ...
  Topic: Are the Kefkit3 leaflets still online?
roberte

Replies: 4
Views: 2896

PostForum: KEF Speakers from the 1970s   Posted: Fri Nov 20, 2009 7:15 pm   Subject: Are the Kefkit3 leaflets still online?
just what I was looking for - thank you!
 
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