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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
RKV1

Replies: 6
Views: 3306

PostForum: DIY with KEF drive units   Posted: Sat Jan 07, 2017 7:58 pm   Subject: R103.2 crossover question
Thanks Steve for double checking.
  Topic: R103.2 crossover question
RKV1

Replies: 6
Views: 3306

PostForum: DIY with KEF drive units   Posted: Sat Jan 07, 2017 7:49 pm   Subject: R103.2 crossover question
No, the original posting was 13 years ago. The schematic for the Carlton III SP2026 looks to be virtually identical to the R103.2. That schematic was taken from a factory blueprint and shows the large ...
  Topic: R103.2 crossover question
RKV1

Replies: 6
Views: 3306

PostForum: DIY with KEF drive units   Posted: Sat Jan 07, 2017 7:12 am   Subject: R103.2 crossover question
The schematic shown in the "Technical" section for the crossover for a R103.2 SP1144 shows a 1.8 mH inductor in the LCR section of the feed to the B200. If I measure the same inductor in my ...
  Topic: 105.2 tweeter crossover questions
RKV1

Replies: 7
Views: 3911

PostForum: KEF Speakers from the 1970s   Posted: Mon Dec 03, 2012 12:00 am   Subject: 105.2 tweeter crossover questions
There definitely shouldn't be any DC in this circuit. javascript:emoticon('Laughing')

Since my hearing is shot above 12Khz it doesn't matter if my speakers peak at 16KHz. So, I've removed L6 and repla ...
  Topic: 105.2 tweeter crossover questions
RKV1

Replies: 7
Views: 3911

PostForum: KEF Speakers from the 1970s   Posted: Sun Dec 02, 2012 6:59 pm   Subject: 105.2 tweeter crossover questions
Thanks speakerguru.

1) So the two versions of the T52 are slightly different, frequency response wise. With my old ears a slight rise in response before cutoff would probably be a good thing.
2)I ...
  Topic: 105.2 tweeter crossover questions
RKV1

Replies: 7
Views: 3911

PostForum: KEF Speakers from the 1970s   Posted: Sun Dec 02, 2012 6:57 pm   Subject: 105.2 tweeter crossover questions
Thanks speakerguru.

1) So the two versions of the T52 are slightly different, frequency response wise. With my old ears a slight rise in response before cutoff would probably be a good thing.
2)I ...
  Topic: 105.2 tweeter crossover questions
RKV1

Replies: 7
Views: 3911

PostForum: KEF Speakers from the 1970s   Posted: Sun Dec 02, 2012 2:12 am   Subject: 105.2 tweeter crossover questions
Hi, I'm a long time KEF owner(1970's to present) but first time poster to this site. I mostly lurk.

My questions are:
1) What is the function of the small inductor L6 (.03mH) in series to the T52 ...
 
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