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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: R103.2 crossover question
SteveB

Replies: 6
Views: 656

PostForum: DIY with KEF drive units   Posted: Sun Jan 15, 2017 11:52 pm   Subject: R103.2 Crossover
So true: still a KEF enthusiast.

I don't post that often (!) but still take an active interest. At this rate, I'll be 68 when the next query comes in!

regards,
Steve.
  Topic: R103.2 crossover question
SteveB

Replies: 6
Views: 656

PostForum: DIY with KEF drive units   Posted: Sat Jan 07, 2017 7:52 pm   Subject: R103.2 Crossover
After thirteen years, I have opened up my KEF 103.2 and checked the inductor values:

You are correct, the inductor values should be as you say; 1.1mH in the LCR section and 1.8mH going to the bass ...
  Topic: Kef Coda 8's
SteveB

Replies: 4
Views: 5163

PostForum: KEF speakers   Posted: Mon May 14, 2007 7:10 pm   Subject: Kef Coda 8's
I have some Coda crossovers that I believe are for KEF CODA 9.2 floorstanders. These are type SP2287A, crossover freq 3KHz and I think they are for 4ohm drivers. I can send a scan of my hand-drawn sc ...
  Topic: Reference 101
SteveB

Replies: 2
Views: 2922

PostForum: KEF Speakers from the 1970s   Posted: Thu Mar 15, 2007 8:26 pm   Subject: Reference 101
This site features the circuit diagram here:
http://www.hifiloudspeakers.info/Anatomy/SpeakerSystems/101/101spec.html

Click on the More Information link at the top of the page. The circuit for the ...
  Topic: Q65 crossovers to be upgraded
SteveB

Replies: 1
Views: 2593

PostForum: KEF speakers   Posted: Fri Mar 09, 2007 9:08 pm   Subject: Q65 schematic
I can let you have a schematic traced from my Q65 crossovers. I have sent you a Private Message so I can email this to you, as I can't attach images to postings on the forum.
  Topic: KEF Q15 and Q65 crossovers
SteveB

Replies: 0
Views: 2962

PostForum: DIY with KEF drive units   Posted: Tue Jul 11, 2006 10:29 pm   Subject: KEF Q15 and Q65 crossovers
I have the drive units to build either of these, and some variants in between.

Does anyone have circuits for the crossovers?
  Topic: RR 103.2 crossover?
SteveB

Replies: 10
Views: 5951

PostForum: DIY with KEF drive units   Posted: Mon Jan 05, 2004 12:28 pm   Subject: RR 103.2 crossover?
Hans,
it is easy to access the crossover. Remove the B200 and disconnect the wires (these are push fit connectors on mine). The crossover is mounted in the base of the cabinet. Lift up the acoustic f ...
  Topic: RR 103.2 crossover?
SteveB

Replies: 10
Views: 5951

PostForum: DIY with KEF drive units   Posted: Sun Jan 04, 2004 1:32 pm   Subject: RR 103.2 crossover?
Hans,
I've sent the crossover circuit to Terry for possible inclusion on the site, along with several others.

Interesting to note that the crossover topology for the bass unit in the R103.2 is exa ...
  Topic: RR 103.2 crossover?
SteveB

Replies: 10
Views: 5951

PostForum: DIY with KEF drive units   Posted: Fri Jan 02, 2004 7:17 pm   Subject: Re: RR 103.2 crossover?
Is it equal to the CS3 crossover (except the extra protection circuitry in the RR 103.2)? I have the schematic of the CS3. I think the drivers are equal (is writen in the CS3 brochure).

The drivers ...
  Topic: Kef 101s
SteveB

Replies: 17
Views: 9884

PostForum: KEF Speakers from the 1970s   Posted: Thu Jan 01, 2004 12:47 pm   Subject: Kef 101s
Terry,
OK, I'll put together some images and technical details of the 101s (and 103.2s) and send them to you.

Regarding 102s, there is a set on eBay at the moment, so I contacted the seller and as ...
  Topic: Kef 101s
SteveB

Replies: 17
Views: 9884

PostForum: KEF Speakers from the 1970s   Posted: Wed Dec 31, 2003 7:44 pm   Subject: Kef 101s
I have a pair of 101s and think they are great for speech and female vocals in particular. Proffski is right - they cannot play as loud as more modern speakers (100db spl max) but they are loud enough ...
 
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