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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: Kef B160 SP1468 SP1500
speakerguru

Replies: 2
Views: 131

PostForum: KEF speakers   Posted: Sun Mar 25, 2018 1:16 pm   Subject: Kef B160 SP1468 SP1500
Too modern for me. Sorry. Those units are from systems designed after I had left KEF.
  Topic: Calling SpeakerGuru: KEF Reference 103.4 - cooked B160's
speakerguru

Replies: 5
Views: 295

PostForum: KEF speakers   Posted: Fri Mar 23, 2018 12:09 pm   Subject: Calling SpeakerGuru: KEF Reference 103.4 - cooked B160's
A question - if the Vas exceeds the specs of the original driver, is this OK? Large Vas is no problem. The actual box volume, which appears in parallel with Vas in the equivalent circuit, would then d ...
  Topic: Calling SpeakerGuru: KEF Reference 103.4 - cooked B160's
speakerguru

Replies: 5
Views: 295

PostForum: KEF speakers   Posted: Thu Mar 22, 2018 10:45 pm   Subject: Re: Calling SpeakerGuru: KEF Reference 103.4 - cooked B160's
All four of the drivers had rubbing and two were OC. All had been subjected to overdriving & heat to the point that the plastic guide in the centre for 2 of them had melted.

Same thing happene ...
  Topic: 105.2 clone with T33 tweeters?
speakerguru

Replies: 10
Views: 640

PostForum: DIY with KEF drive units   Posted: Sun Mar 04, 2018 12:16 pm   Subject: 105.2 clone with T33 tweeters?

to give some clarification: I am asking myself if I can "implant" the HF section of the 105.4 into the 105.2's crossover (keeping the circuit for the mids and lows as it is in the 105.2 be ...
  Topic: 105.2 clone with T33 tweeters?
speakerguru

Replies: 10
Views: 640

PostForum: DIY with KEF drive units   Posted: Fri Mar 02, 2018 12:55 pm   Subject: 105.2 clone with T33 tweeters?
If anybody could supply a little additional expertise on using the HT section of the 105.4 instead of the one of the 105.2 here with the T33 I want to fit in, that would be fantastic. thanks!
I desig ...
  Topic: Crossover schematic wanted for KEF BBC LS5/1AE Monitors
speakerguru

Replies: 1
Views: 265

PostForum: KEF speakers   Posted: Thu Nov 30, 2017 3:41 pm   Subject: Crossover schematic wanted for KEF BBC LS5/1AE Monitors
No. I only ever worked on the all active KEF version 5/1AC.
  Topic: KEF 107 - Looking for a KUBE Power Supply/Adapter
speakerguru

Replies: 3
Views: 427

PostForum: KEF speakers   Posted: Fri Oct 27, 2017 3:44 pm   Subject: KEF 107 - Looking for a KUBE Power Supply/Adapter
You need an ac/ac adapter with 23V 300mA output.
  Topic: KEF LF Speaker Bolts
speakerguru

Replies: 5
Views: 2878

PostForum: KEF speakers   Posted: Wed Oct 11, 2017 8:55 pm   Subject: Re: KEF SP1280 SPIDER BOLTS
Can anyone tell me the specified or approx. torque setting for the spider bolts, please?

Sorry, no.
  Topic: Looking for a pair of KEF B200 SP1039 drivers for sale
speakerguru

Replies: 4
Views: 693

PostForum: KEF Speakers from the 1970s   Posted: Mon Aug 07, 2017 8:32 am   Subject: Looking for a pair of KEF B200 SP1039 drivers for sale
Model 103 used SP1039 woofers. Model 103|4 used a B160 6.5" midrange.
  Topic: Looking for a pair of KEF B200 SP1039 drivers for sale
speakerguru

Replies: 4
Views: 693

PostForum: KEF Speakers from the 1970s   Posted: Sun Aug 06, 2017 3:48 pm   Subject: Looking for a pair of KEF B200 SP1039 drivers for sale
v. similar units size and Q-wise as the Cadenza and Model 104 are similar alignments in similar size boxes. However the 1039 has a lower distortion short coil in a long magnetic gap motor whereas the ...
  Topic: KEF Chorale.
speakerguru

Replies: 17
Views: 1880

PostForum: KEF Speakers from the 1970s   Posted: Thu Jul 13, 2017 3:19 pm   Subject: KEF Chorale.
eBay is probably the best source for woofers.

6.5 Ohms d.c. is the typical resistance for an "8 Ohm" driver and one to be used in a nominal "8 Ohm" system.

happy hunting
  Topic: KEF Chorale.
speakerguru

Replies: 17
Views: 1880

PostForum: KEF Speakers from the 1970s   Posted: Wed Jul 12, 2017 1:53 pm   Subject: KEF Chorale.
No, sorry. I know nothing about Super Lintons.
  Topic: KEF Chorale.
speakerguru

Replies: 17
Views: 1880

PostForum: KEF Speakers from the 1970s   Posted: Wed Jul 05, 2017 7:40 am   Subject: Re: KEF Chorale.
... after unwinding a small amount of the copper wire and soldering them to the terminals

I do hope you re-used the braids. The vc wire will fatigue and break if allowed to move or vibrate. Also on ...
  Topic: KEF Chorale.
speakerguru

Replies: 17
Views: 1880

PostForum: KEF Speakers from the 1970s   Posted: Wed Jul 05, 2017 7:36 am   Subject: KEF Chorale.
Assuming the vc is still circular, it is centered using a 0.007"' shim between it and the magnet centre pole. When the glue is set, pull out the shim and glue on the dust cap. It should be comple ...
  Topic: KEF Chorale.
speakerguru

Replies: 17
Views: 1880

PostForum: KEF Speakers from the 1970s   Posted: Tue Jun 27, 2017 8:46 am   Subject: KEF Chorale.
"The tiny wire inside the spider" can be repaired but do you know which wire? The visible wire from the voice coil to the terminal panel is a special copper-phosphor bronze woven braid with ...
 
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