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ollie80
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Joined: 21 Dec 2011
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Location: Kent
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 Posted: Thu Dec 22, 2011 11:13 am Post subject: KEF Corelli Speakers |
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Hi All,
Just joined and really enjoying the forum!! 
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! 
Merry Christmas!
Ollie
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ColinR
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Joined: 31 Jul 2004
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Location: Staffordshire
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| Posted: Thu Dec 22, 2011 12:01 pm Post subject: |
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| 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.
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 you've been ripped off by a sleezeBay shyster.
Individual KEF crossovers are for specific designs and are not interchangeable.
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proffski
Über Contributor 1000+
Joined: 22 Aug 2003
Posts: 1297
Location: Tewkesbury UK
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| Posted: Thu Dec 22, 2011 12:06 pm Post subject: Re: KEF Corelli Speakers |
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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
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ollie80
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Joined: 21 Dec 2011
Posts: 9
Location: Kent
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| Posted: Thu Dec 22, 2011 12:17 pm Post subject: |
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| 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.
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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 
Not a good start for me... 
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
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ollie80
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| Posted: Thu Dec 22, 2011 12:18 pm Post subject: Re: KEF Corelli Speakers |
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Thanks for link proffski.. Anyone got any spare DN-17s ??!!
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ColinR
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Joined: 31 Jul 2004
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| Posted: Thu Dec 22, 2011 12:39 pm Post subject: |
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| Quote: | | Anyone got any spare DN-17s |
I don't think so, but I'll look  .
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 .
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ollie80
Introductory Contributor
Joined: 21 Dec 2011
Posts: 9
Location: Kent
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| Posted: Thu Dec 22, 2011 12:52 pm Post subject: |
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[quote="ColinR"] | Quote: | | Anyone got any spare DN-17s |
I don't think so, but I'll look .
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
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ColinR
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| Posted: Thu Dec 22, 2011 1:07 pm Post subject: |
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| 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 .
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ollie80
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Posts: 9
Location: Kent
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| Posted: Thu Dec 22, 2011 1:46 pm Post subject: |
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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!!
Ollie
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proffski
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Joined: 22 Aug 2003
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Location: Tewkesbury UK
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| Posted: Thu Dec 22, 2011 1:56 pm Post subject: |
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I'll make it one day but Tewkesbury is just too far away, I hear so much favourable reports about the event!
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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.
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ollie80
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Joined: 21 Dec 2011
Posts: 9
Location: Kent
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| Posted: Thu Dec 22, 2011 3:08 pm Post subject: |
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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
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