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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 LF Speaker Bolts
flumoxed

Replies: 5
Views: 5193

PostForum: KEF speakers   Posted: Tue Nov 14, 2017 8:50 am   Subject: Re: KEF SP1280 SPIDER BOLTS
Can anyone tell me the specified or approx. torque setting for the spider bolts, please?

Sorry, no.

Many thanks for your reply.

I measured it at < 1 N . M.

Solution seems to be:

1. A ...
  Topic: KEF LF Speaker Bolts
flumoxed

Replies: 5
Views: 5193

PostForum: KEF speakers   Posted: Tue Oct 10, 2017 4:09 pm   Subject: KEF SP1280 Spider Bolts
Can anyone tell me the specified or approx. torque setting for the spider bolts, please?

The torque driver I'm looking at is rated at 1 - 6 N . M

Many thanks.
  Topic: Ferrofluid in KEF tweeters
flumoxed

Replies: 6
Views: 8689

PostForum: KEF speakers   Posted: Mon Oct 02, 2017 6:22 am   Subject: Ferrofluid in KEF tweeters
Good HIFI VOF, NL sells ferrofluid formulated specially for speaker drivers. Price is about $20 for 1 CC (enough for 20 tweeters) compared to $6 for generic ferrofluid from Parts Express.
  Topic: KEF LF Speaker Bolts
flumoxed

Replies: 5
Views: 5193

PostForum: KEF speakers   Posted: Sun Dec 06, 2015 12:47 am   Subject: KEF LF Speaker Bolts
The three bolts would have originally been torqued up to the same setting. The magnet is decoupled from the chassis by the three soft blue elastomer grommets. It should have some "float".
...
  Topic: KEF LF Speaker Bolts
flumoxed

Replies: 5
Views: 5193

PostForum: KEF speakers   Posted: Sat Dec 05, 2015 6:24 am   Subject: KEF LF Speaker Bolts
Kindly tell me if the three bolts attaching the spider (arrowed in photo) should be fully tightened? (Mine are tightened unevenly.)

http://img23.imagevenue.com/loc352/th_277671714_SP1280Woofer1_122 ...
  Topic: WANTED: KEF Q60 (SP2189A) CIRCUIT DIAGRAM
flumoxed

Replies: 2
Views: 4136

PostForum: KEF speakers   Posted: Mon Oct 26, 2015 1:24 am   Subject: WANTED: KEF Q60 (SP2189A) CIRCUIT DIAGRAM - PROJECT FINISHED
Somebody kindly sent me the circuit diagram and I have finished rebuilding the crossovers. The speakers sound surprisingly good. In case anyone is interested this is the route I took:

1. PCB:
ht ...
  Topic: WANTED: KEF CELESTE IV (SP1108) CIRCUIT DIAGRAM
flumoxed

Replies: 4
Views: 4148

PostForum: KEF speakers   Posted: Mon Oct 26, 2015 12:33 am   Subject: WANTED: KEF CELESTE IV (SP1108) CIRCUIT DIAGRAM
I can't see anyone having this somehow.

If this is super important to you and you're willing to be without the crossovers for a while, PM me to arrange a way for me to trace the circuit and measure ...
  Topic: WANTED: KEF CELESTE IV (SP1108) CIRCUIT DIAGRAM
flumoxed

Replies: 4
Views: 4148

PostForum: KEF speakers   Posted: Mon Oct 26, 2015 12:28 am   Subject: WANTED: KEF CELESTE IV (SP1108) CIRCUIT DIAGRAM
I saw a couple of crossover boards sold on ebay. It appears to be a pretty simple and straightforward crossover that you can trace even from the PCB.

Is it the values of the inductors that you rea ...
  Topic: WANTED: KEF CELESTE IV (SP1108) CIRCUIT DIAGRAM
flumoxed

Replies: 4
Views: 4148

PostForum: KEF speakers   Posted: Fri Oct 23, 2015 2:36 pm   Subject: WANTED: KEF CELESTE IV (SP1108) CIRCUIT DIAGRAM
Hi, all.

Can someone help me with a clear scan of the KEF Celeste IV (SP1108) circuit diagram (.pdf file), please? Willing to pay reasonable sum via PayPal if necessary.

Many TX.
  Topic: WANTED: KEF Q60 (SP2189A) CIRCUIT DIAGRAM
flumoxed

Replies: 2
Views: 4136

PostForum: KEF speakers   Posted: Sun Aug 30, 2015 1:30 am   Subject: WANTED: KEF Q60 (SP2189A) CIRCUIT DIAGRAM
Hi, all.

I have searched the Forum but cannot find what I am looking for.
I need a clear scan of the KEF Q60 circuit diagram (.pdf file). Willing to pay reasonable sum via PayPal if necessary.
...
  Topic: KEF Q60 BOOKSHELF SPEAKERS - TWEETERS DIAGNOSTICS
flumoxed

Replies: 3
Views: 5124

PostForum: KEF speakers   Posted: Fri Jul 03, 2015 12:56 am   Subject: Re: KEF Q60 BOOKSHELF SPEAKERS - TWEETERS DIAGNOSTICS(2)
Hi to the Experts.

I wonder if my SP1276 tweeters are faulty as follows:

1. Removed gold-plated strap between HF and LF speaker terminals
2. Connected speaker cables to LF terminals.
3. Played ...
  Topic: KEF Q60 BOOKSHELF SPEAKERS - TWEETERS DIAGNOSTICS
flumoxed

Replies: 3
Views: 5124

PostForum: KEF speakers   Posted: Sat Jun 27, 2015 10:38 am   Subject: KEF Q60 BOOKSHELF SPEAKERS - TWEETERS DIAGNOSTICS
Hi to the Experts.

I wonder if my SP1276 tweeters are faulty as follows:

1. Removed gold-plated strap between HF and LF speaker terminals
2. Connected speaker cables to LF terminals.
3. Played ...
  Topic: KEF Q60 BOOKSHELF SPEAKERS - TWEATER IMPEDANCE, ETC.
flumoxed

Replies: 6
Views: 7924

PostForum: KEF speakers   Posted: Fri Apr 10, 2015 1:53 am   Subject: Re: KEF Q60 B200 bass/midrange unit (SP1280)

Attached is a new photo. 1 is the round soft rubber seal. 2 is the preformed channel that beds the seal.

Looks like the same photo to me and the parts labelled 1 and 2 are what I thought you were ...
  Topic: KEF Q60 BOOKSHELF SPEAKERS - TWEATER IMPEDANCE, ETC.
flumoxed

Replies: 6
Views: 7924

PostForum: KEF speakers   Posted: Thu Apr 09, 2015 1:50 pm   Subject: KEF Q60 B200 bass/midrange unit (SP1280)
You got me flummoxed alright! I see nothing in the photo that I can relate to your descriptions. Sorry.

The photo shows the back of the magnet back-plate, tweeter retainer/spacer moulding and exit ...
  Topic: KEF Q60 BOOKSHELF SPEAKERS - TWEATER IMPEDANCE, ETC.
flumoxed

Replies: 6
Views: 7924

PostForum: KEF speakers   Posted: Wed Apr 08, 2015 3:27 pm   Subject: Re: KEF Q60 BOOKSHELF SPEAKERS - TWEATER IMPEDANCE, ETC.
Speakerguru wrote:

Not sure I know what you mean by 3.5mm dia rubber seals. KEF used to use self-adhesive (sim. to draught excluder) neoprene strip on woofers. This is readily available in a number ...
 
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