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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: Amplifiers used by KEF in the late 80's/early 90's?
SimplySound

Replies: 2
Views: 3572

PostForum: KEF speakers   Posted: Fri Mar 29, 2013 7:42 pm   Subject: Amplifiers used by KEF in the late 80's/early 90's?
Perhaps the Quad 606 as well?

http://wp.hi-fi-insight.com/wp-content/uploads/2006/12/Quad_606_Power_Amplifier.jpg

http://www.primeaudio.co.kr/bbs/data/pds/quad_606_1.jpg
  Topic: Kef b300 in smaller enclosures
SimplySound

Replies: 21
Views: 20022

PostForum: DIY with KEF drive units   Posted: Thu Mar 28, 2013 3:19 pm   Subject: Kef b300 in smaller enclosures
In some older threads it was described how difficult it was to model and then finetune (by testing and modification) the bandpass tuning. It is self-evidently more complex to optimise and more expen ...
  Topic: Kef b300 in smaller enclosures
SimplySound

Replies: 21
Views: 20022

PostForum: DIY with KEF drive units   Posted: Wed Mar 27, 2013 4:42 am   Subject: Kef b300 in smaller enclosures
As a student of matters "coupled cavity bass" I keep returning to the same question. If truth is universal, and the twin coupled cavity bass is so "clever" why do more people not u ...
  Topic: Kef b300 in smaller enclosures
SimplySound

Replies: 21
Views: 20022

PostForum: DIY with KEF drive units   Posted: Tue Mar 26, 2013 2:53 pm   Subject: Kef b300 in smaller enclosures
KEF would never do an "isobaric" because that is a misnomer. It is just equivalent to a single driver of twice the mass and twice the motor strength. If KEF had wanted that, they would have ...
  Topic: Grill on or off ?
SimplySound

Replies: 18
Views: 8974

PostForum: KEF speakers   Posted: Thu Mar 21, 2013 5:40 am   Subject: Grill on or off ?
My guess is that it was done to get the bass-output as far from the floor as possible to avoid reflections which influence the signal.
Don't think that the low frequencies will ever interfere with th ...
  Topic: What is your preferred KEF bass system ?
SimplySound

Replies: 24
Views: 11245

PostForum: KEF speakers   Posted: Thu Mar 21, 2013 5:35 am   Subject: Re: KEF TL?
I don't recall any production TL systems by KEF .
That's because there's no such thing as a transmission line speaker (that would fit into any domestic room). It's either a lossy pipe or a lossy refl ...
  Topic: KUBE 107|2
SimplySound

Replies: 3
Views: 2523

PostForum: KEF speakers   Posted: Thu Mar 21, 2013 5:25 am   Subject: KUBE 107|2
I know this has probably been asked a billion times, but is there a schematic for the "Original" KEF 107 KUBE? Just wondering.

Doug
  Topic: Kef 105 Covers
SimplySound

Replies: 11
Views: 4102

PostForum: KEF Speakers from the 1970s   Posted: Wed Mar 13, 2013 6:44 am   Subject: Kef 105 Covers
[URL=http://phoenix.craigslist.org/evl/ele/3652565564.html] Well these are US based and MkII's but it is hard to come by these. Shipping may not be too bad because they are light.

Use 'em if you n ...
  Topic: Grill on or off ?
SimplySound

Replies: 18
Views: 8974

PostForum: KEF speakers   Posted: Wed Mar 13, 2013 6:35 am   Subject: Grill on or off ?
Let's take this a step further... what is the science behind porting the LF of the R107 cabinet directly in front of the MF/HF Heads? Was there something about "mixing" the Bass Wave with t ...
  Topic: T33 Ferrofluid - Anyone know?
SimplySound

Replies: 14
Views: 13136

PostForum: KEF speakers   Posted: Wed Mar 13, 2013 6:26 am   Subject: T33 Ferrofluid - Anyone know?
You beat me to it Laughing

All I can say Guru, is a big thanks so much for the support you guys with "knowledge" provide to the KEF Fans in the UK and a broad... without you guys we'd be lo ...
  Topic: T33 Ferrofluid - Anyone know?
SimplySound

Replies: 14
Views: 13136

PostForum: KEF speakers   Posted: Tue Mar 12, 2013 10:55 pm   Subject: T33 Ferrofluid - Anyone know?
Ok... dug around on the site and found this from Speaker Guru....

More info here http://ferrofluid.ferrotec.com/products/ferrofluid/audio/
KEF used to use the now obsolete APG512 which you won't f ...
  Topic: T33 Ferrofluid - Anyone know?
SimplySound

Replies: 14
Views: 13136

PostForum: KEF speakers   Posted: Tue Mar 12, 2013 9:41 pm   Subject: T33 Ferrofluid - Anyone know?
Hi Folks,

I contacted Ferrotec to inquire about what Ferrofluid was used in the T33's. Especially the T33 SP1210 used on the KEF R107. I am considering having the fluid replaced and it would be g ...
  Topic: Troubles with a pair of IMF TLS 50
SimplySound

Replies: 7
Views: 6665

PostForum: Other speakers   Posted: Tue Mar 05, 2013 6:13 pm   Subject: Troubles with a pair of IMF TLS 50
I just rebuilt my TLS-50MkII's. I used the Coles 16ohm replacement from [url=http://www.falconacoustics.co.uk]Falcon Acoustics. I also had to replace the mid's with the Monacor. They have the [url= ...
  Topic: KEF T33 SP1192 Ferrofluid
SimplySound

Replies: 29
Views: 23302

PostForum: KEF speakers   Posted: Fri Jun 22, 2012 6:33 am   Subject: KEF T33 SP1192 Ferrofluid
Well, it was pretty strait forward...

Hi Golnar... do you have any pictures?
  Topic: 107 ref. superb veneer quality!
SimplySound

Replies: 4
Views: 3518

PostForum: KEF speakers   Posted: Fri Jun 22, 2012 6:25 am   Subject: 107 ref. superb veneer quality!
I've been doing my Walnut Cabs as well. Used some fine steel wool with a mixture of Minwax "Natural" stain with just a bit of "Red Oak". After the rub down with the stain I used ...
 
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