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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: Capacitor size - KEF 105
lt2525

Replies: 13
Views: 4917

PostForum: KEF Speakers from the 1970s   Posted: Fri Dec 09, 2011 7:34 pm   Subject: Capacitor size - KEF 105
Hmmmm, that's curious. So if I understand properly you are saying that the circuit was built around the actual value of the cap as measured at the time, rather than the nominal value of the units?

...
  Topic: KEF cabinet restoring
lt2525

Replies: 9
Views: 4789

PostForum: KEF Speakers from the 1970s   Posted: Fri Dec 09, 2011 7:15 pm   Subject: KEF cabinet restoring
Most of the threads here deal with the electronic characteristics of these lovely KEF speakers.

I obtained my pair of 105's in a resale arrangement and while in decent shape, the cabinets are a bit ...
  Topic: Hello everyone - I'm new here
lt2525

Replies: 11
Views: 4410

PostForum: KEF Speakers from the 1970s   Posted: Fri Dec 09, 2011 7:11 pm   Subject: Hello everyone - I'm new here
Hi JE from a fellow Ottawa resident!

How is the Cadenza project coming along?

Looks like the cabinets could use some care. Tat reminds me that I wanted to start a thread regarding cabinet restor ...
  Topic: Capacitor size - KEF 105
lt2525

Replies: 13
Views: 4917

PostForum: KEF Speakers from the 1970s   Posted: Fri Dec 09, 2011 5:26 pm   Subject: Capacitor size - KEF 105
Well just to update, I looked at creating an outboard lunch box but decided against it.
Given the wiring necessary from both the input to the output and the necessity of having this box sit somewher ...
  Topic: Capacitor size - KEF 105
lt2525

Replies: 13
Views: 4917

PostForum: KEF Speakers from the 1970s   Posted: Thu Dec 01, 2011 8:57 pm   Subject: Capacitor size - KEF 105
Idea OK, thanks for the feedback. I'll look into the lunchbox.


On a side note and basically for my own interest, could you comment on the original question?.... would having a largish object in ...
  Topic: Capacitor size - KEF 105
lt2525

Replies: 13
Views: 4917

PostForum: KEF Speakers from the 1970s   Posted: Thu Dec 01, 2011 8:35 pm   Subject: Capacitor size - KEF 105
So, you'd put the entire xover in an external box?
  Topic: Capacitor size - KEF 105
lt2525

Replies: 13
Views: 4917

PostForum: KEF Speakers from the 1970s   Posted: Thu Dec 01, 2011 8:14 pm   Subject: Capacitor size - KEF 105
Hi,
I am just getting back to an earlier project to repair the x-over in a pair of KEF 105 -1's.

Some of the components had been damaged by an electrical accident Crying or Very sad

Anyway, I have now man ...
  Topic: 105 mk 1 crossover repair
lt2525

Replies: 6
Views: 3682

PostForum: KEF Speakers from the 1970s   Posted: Sun Nov 07, 2010 9:02 pm   Subject: 105 mk 1 crossover repair
That's a great source... would there be anyone like that on this side of the pond?
Question
  Topic: 105 mk 1 crossover repair
lt2525

Replies: 6
Views: 3682

PostForum: KEF Speakers from the 1970s   Posted: Sun Nov 07, 2010 1:03 am   Subject: 105 mk 1 crossover repair
Well I think the capacitor values have changed over the years, for example, I did measure the first 3.3 uF cap in the tweeter section, and I read 5.2 uF.
  Topic: 105 mk 1 crossover repair
lt2525

Replies: 6
Views: 3682

PostForum: KEF Speakers from the 1970s   Posted: Sat Nov 06, 2010 9:32 pm   Subject: 105 mk 1 crossover repair
I am recovering from an unfortunate sound system mishap. ('Sad')
I think the original cause was a floor standing lamp with a metal base which has that touch control (touch the metal and it turns on/o ...
  Topic: Two B110B drivers deteriorating at same time...audio source?
lt2525

Replies: 26
Views: 13958

PostForum: DIY with KEF drive units   Posted: Wed Dec 09, 2009 11:33 pm   Subject: Two B110B drivers deteriorating at same time...audio source?
The drivers have arrived. They are labelled and definitely say KEF B110 SP1057, consecutive serial #'s.
Very Happy

There is a bit of a difference in the configuration of the magnet. The part where it coup ...
  Topic: Monitor Audio MA-10 / B110B drivers
lt2525

Replies: 12
Views: 8354

PostForum: Other speakers   Posted: Thu Dec 03, 2009 9:11 pm   Subject: Monitor Audio MA-10 / B110B drivers
Well, attempting to repair these speakers has been an interesting journey.

So as posted elsewhere in this forum, I encountered someone with a pair of B110's SP1057 taken from a Meridian system. Whi ...
  Topic: Two B110B drivers deteriorating at same time...audio source?
lt2525

Replies: 26
Views: 13958

PostForum: DIY with KEF drive units   Posted: Sun Nov 29, 2009 3:37 pm   Subject: Two B110B drivers deteriorating at same time...audio source?
These look like plain common SP1057 drivers for KEF loudspeakers. The constructor series have a "Constructor Series" adhesive around the magnet.

How do your drivers look like?

Colin, ...
  Topic: Two B110B drivers deteriorating at same time...audio source?
lt2525

Replies: 26
Views: 13958

PostForum: DIY with KEF drive units   Posted: Sat Nov 28, 2009 11:21 pm   Subject: Replacement drivers
I have contacted someone with some B110 SP1057 units that were removed from a Meridian speaker. Here are some pics

http://i973.photobucket.com/albums/ae218/lt2525/MA-10/dcp_01492.jpg


http://i ...
  Topic: Monitor Audio MA-10 / B110B drivers
lt2525

Replies: 12
Views: 8354

PostForum: Other speakers   Posted: Sat Nov 21, 2009 3:43 am   Subject: B110 - white belly?
Still looking for a pair of B110 SP 1057's and have run into a couple of people who have mentioned the "white belly" version of this driver.

Could anyone comment on what the difference mi ...
 
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