SpeakerTalk Forum Index SpeakerTalk
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.
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

KEF Corelli Speakers

 
Post new topic   Reply to topic    SpeakerTalk Forum Index -> KEF Speakers from the 1970s
View previous topic :: View next topic  
Author Message
ollie80
Introductory Contributor


Joined: 21 Dec 2011
Posts: 9
Location: Kent

PostPosted: Thu Dec 22, 2011 11:13 am    Post subject: KEF Corelli Speakers Reply with quote

Hi All,

Just joined and really enjoying the forum!! Very Happy

Ive just purchased my vintage KEF Corelli speakers

I gave them a good test but noticed one of the T27 tweeters sounded very hollow, bit too bright it also started to pop slightly. I thought it might be blown so searched on ebay for a new set - surprise surprise there were a pair on there but bidding got a little too high for me (around £105.00)

I stopped and thought over the issue and the more I thought about it I started to think maybe the crossover could be at fault. So I tasked myself with swapping the tweeters over from the other cab to the other and hey presto the "faulty tweeter" worked fine!! And of course the "good tweeter" sounded like the symptoms above.

My crossovers are DN-17s, I tooK the suspect crossover out and could not see any evidence of burns or cap swelling. Im keen to get my Corelli speakers working soon so poped over to ebay and purchased a pair of DN-13 crossovers - the seller has a history of selling KEF components and assured me the DN-13s will be fine.

My bass drivers are the SP1063

Will let you know the outcome! Smile

Merry Christmas!

Ollie
_________________
Ollie Kiell
Back to top
View user's profile Send private message Send e-mail
ColinR
Über Contributor 1000+


Joined: 31 Jul 2004
Posts: 1175
Location: Staffordshire

PostPosted: Thu Dec 22, 2011 12:01 pm    Post subject: Reply with quote

Quote:
purchased a pair of DN-13 crossovers - the seller has a history of selling KEF components and assured me the DN-13s will be fine.


Mad you've been ripped off by a sleezeBay shyster.

Individual KEF crossovers are for specific designs and are not interchangeable.
_________________
This post or any other information supplied to this website or any other by myself is not available for any form of commercial purpose i.e. to hi-fi magazines or as sales and marketing material for sleezeBay or Audiodogging pimps and the like.
Back to top
View user's profile Send private message
proffski
Über Contributor 1000+


Joined: 22 Aug 2003
Posts: 1296
Location: Tewkesbury UK

PostPosted: Thu Dec 22, 2011 12:06 pm    Post subject: Re: KEF Corelli Speakers Reply with quote

Welcome to the Audio Sanatorium.

Colin beat me to it, but he is quite correct with his statement.
Here is the genuine article: http://www.hifiloudspeakers.info/Anatomy/Crossovers/DN17SP1052Corelli/Gallery/index.htm
_________________
I contend that for a nation to try to tax itself into prosperity is like a
man standing in a bucket and trying to lift himself up by the handle.
-Winston Churchill
Back to top
View user's profile Send private message Send e-mail
ollie80
Introductory Contributor


Joined: 21 Dec 2011
Posts: 9
Location: Kent

PostPosted: Thu Dec 22, 2011 12:17 pm    Post subject: Reply with quote

ColinR wrote:
Quote:
purchased a pair of DN-13 crossovers - the seller has a history of selling KEF components and assured me the DN-13s will be fine.


Mad you've been ripped off by a sleezeBay shyster.

Individual KEF crossovers are for specific designs and are not interchangeable.


Hello Colin! OH DEARY ME Rolling Eyes

Not a good start for me... Embarassed

So Im gussing we are saying the DN-13s were designed for a particular KEF model and the 17s are specificilly for the Corelli ? Will the 13s change the characteristics of my t27 and SP1063
_________________
Ollie Kiell
Back to top
View user's profile Send private message Send e-mail
ollie80
Introductory Contributor


Joined: 21 Dec 2011
Posts: 9
Location: Kent

PostPosted: Thu Dec 22, 2011 12:18 pm    Post subject: Re: KEF Corelli Speakers Reply with quote

proffski wrote:
Welcome to the Audio Sanatorium.

Colin beat me to it, but he is quite correct with his statement.
Here is the genuine article: http://www.hifiloudspeakers.info/Anatomy/Crossovers/DN17SP1052Corelli/Gallery/index.htm



Thanks for link proffski.. Anyone got any spare DN-17s ??!!
_________________
Ollie Kiell
Back to top
View user's profile Send private message Send e-mail
ColinR
Über Contributor 1000+


Joined: 31 Jul 2004
Posts: 1175
Location: Staffordshire

PostPosted: Thu Dec 22, 2011 12:39 pm    Post subject: Reply with quote

Quote:
Anyone got any spare DN-17s


I don't think so, but I'll look Wink .

The DN13 Chorale crossover "will work" but it's capacitors are probably more cooked than the Corelli DN17s.

The power handling will be reduced from 50W to 25W.

Can you solder?

Get 2*(30uF, 3.3uF, 0.6uF) and 6*10uF capacitors from www.falconacoustics.co.uk or elsewhere as the inductors and resistors are unlikely to be damaged.

If you cannot solder, find a friend or U-Tube and learn Very Happy .
_________________
This post or any other information supplied to this website or any other by myself is not available for any form of commercial purpose i.e. to hi-fi magazines or as sales and marketing material for sleezeBay or Audiodogging pimps and the like.
Back to top
View user's profile Send private message
ollie80
Introductory Contributor


Joined: 21 Dec 2011
Posts: 9
Location: Kent

PostPosted: Thu Dec 22, 2011 12:52 pm    Post subject: Reply with quote

[quote="ColinR"]
Quote:
Anyone got any spare DN-17s


I don't think so, but I'll look Wink .

Thanks for a really helpful reply Colin.. I will take a look at the Falcon website

The DN13 Chorale crossover "will work" but it's capacitors are probably more cooked than the Corelli DN17s.

When you say cooked you mean knackered?




The power handling will be reduced from 50W to 25W.

Wow thats a big drop in power there!

Can you solder?

Yes, infact better on these older circuit boards
_________________
Ollie Kiell
Back to top
View user's profile Send private message Send e-mail
ColinR
Über Contributor 1000+


Joined: 31 Jul 2004
Posts: 1175
Location: Staffordshire

PostPosted: Thu Dec 22, 2011 1:07 pm    Post subject: Reply with quote

Quote:
When you say cooked you mean knackered


Yes, the simpler topograpy will allow operation using just the inductors, so "it'll work" although it's stuffed.

Quote:
Wow thats a big drop in power there


So keep the volume down.

Quote:
infact better on these older circuit boards


Try to avoid modern Lead free solder unless you clean off all the old melt, the new stuff does not mix with the old so the chances of getting a "dry joint" are a racing certainty.

Replace the 3.3uF and then the first 10uF in the treble section.

As you're in Kent, come an say hello at Tonbridge http://www.audiojumble.co.uk/ in seven weeks time Very Happy .
_________________
This post or any other information supplied to this website or any other by myself is not available for any form of commercial purpose i.e. to hi-fi magazines or as sales and marketing material for sleezeBay or Audiodogging pimps and the like.
Back to top
View user's profile Send private message
ollie80
Introductory Contributor


Joined: 21 Dec 2011
Posts: 9
Location: Kent

PostPosted: Thu Dec 22, 2011 1:46 pm    Post subject: Reply with quote

Thanks very much Colin. I will take your advise on board!

Oh and thanks very much for the audio jumble link!! Im there!! Its only down the road, around 30mins drive.

Thanks!! Very Happy

Ollie
_________________
Ollie Kiell
Back to top
View user's profile Send private message Send e-mail
proffski
Über Contributor 1000+


Joined: 22 Aug 2003
Posts: 1296
Location: Tewkesbury UK

PostPosted: Thu Dec 22, 2011 1:56 pm    Post subject: Reply with quote

I'll make it one day but Tewkesbury is just too far away, I hear so much favourable reports about the event!
_________________
I contend that for a nation to try to tax itself into prosperity is like a
man standing in a bucket and trying to lift himself up by the handle.
-Winston Churchill
Back to top
View user's profile Send private message Send e-mail
ollie80
Introductory Contributor


Joined: 21 Dec 2011
Posts: 9
Location: Kent

PostPosted: Thu Dec 22, 2011 3:08 pm    Post subject: Reply with quote

thats a shame.. at least the good website has loads of pics of the events.. not the same I know but good to see what went on.

Ollie
_________________
Ollie Kiell
Back to top
View user's profile Send private message Send e-mail
Display posts from previous:   
Post new topic   Reply to topic    SpeakerTalk Forum Index -> KEF Speakers from the 1970s All times are GMT + 1 Hour
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group