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Old 17th April 2007, 04:15 PM   #21
qwad is offline qwad  Australia
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l have to agree with the previous poster the coles super tweeter is not up to the rest of the system even expert opinion of the time prefered the hf 2000 over it judging by the number of times it was recommended in diy projects of the '70s over the coles and if anyone wants it or is interested: l have the t/s paramaters for the 12 in bass driver....... cheers TC
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Old 17th April 2007, 06:06 PM   #22
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Default Ditton 66

In meantime I finished the clone of the audio note an e speakers, and after a initial burn-up I noticed that the sound of the my new speakers have some similarities in timbre with my old celestions, especially in mids and bass. This color of sound I mostly like in my old speakers, the color of old school of speaker builders.
Natrually, a highs cannot be compared, because as I mentioned before, they were the weakest spot of the speaker s construction. But, interesting thing is that the actually smaller driver of 8" in properly built enclosure had aparentlly stronger bass performance than the 12" celestion woofer. I think, if somebody could refurbish celestion boxes using same methods which were been used by mr. snell the results probbably would be truly amazing.
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Old 17th April 2007, 09:41 PM   #23
qwad is offline qwad  Australia
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thats more than likely because your 8 in has a higher qts than the celestion 12" cheers TC
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Old 18th April 2007, 06:59 AM   #24
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Default celestion ditton 66

[QUOTE
res [dcr] 4 ohms
fs 22.5 Hz
Sd 511cm 2
Bl 11.5 n/a
sens1w-1m 91.2 dB
Qms 5.32
Qes 0.32
Qts, 0.30
[/QUOTE]

Hm, if above paremeters are right, the 8" seas parameters which I found on troels webpage are little strange


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Old 21st April 2007, 04:45 PM   #25
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Agreed, these hf2000's are not up the rest of this speaker, has anybody tried dropping in a later Celestion tweeter say from the 3's or even the sl6's and taken measurments?

Thanks T.
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Old 21st April 2007, 05:13 PM   #26
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Hi tonedef2,
its good you are back in the Celestion 66 discussions in the Forum !

I posted some later comments in the other thread we were discussing the 66s and cross-overs in.
I'll add to that here, now that you've reconditioned your MD500s you may be hearing what were prevoiusly less obvious annomolies elsewhere.
You did say you had the x-overs checked, but how thoroughly did who-ever do this, and under what degree of voltage stress ?
If the series feed cap to your tweeters has gone aeven slightly leaky, or is now some-what larger capacitance than its Nominal value, the tweeters may be being driven too low in frequency, and that would cause distortions, and eventually damage.
Alternately, they may not be to the quality of the MD500s, but do check the above first.
I'll post some on how to do this if you are not sure of.

Its probably more consistent to discuss this in the other Thread under what I posted there.

Grahame seems to have got a spare MD500 now and 2 cross-overs, but I don't know if same as those in the 66s you have as photo on ebay looked different, but the inductors may be the same, thus new caps could be added for comparison with his other cross-overs.
See also the 66 Mids'Thread he and I have discussed this in.

regards,
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Old 21st April 2007, 05:26 PM   #27
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Yes he bought off eBay, i saw those aswell, very likely will need the same work his does after too long..
Yes will continue in other thread...

ToneDef2
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Old 21st August 2007, 12:15 PM   #28
Thomo is offline Thomo  United Kingdom
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Hi. I own a pair of Ditton 25's and just have a quick question.

Is the bass driver in the 25's the same as the 66's? I really like the 66's and am thinking of building a replica if my current drivers are the right type.

Cheers,

Lee.
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Old 23rd August 2007, 04:37 AM   #29
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Hello,

Well what's the number on the driver?
You can compare it to the numbers in the other thread concerning the 66 restoration project, just do a seach hear......
You will find it very helpful!

TonDef2
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Old 24th August 2008, 09:40 AM   #30
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Default celestion 66's

Hi

Does anyone know where i can get one crossover for the dittons 66 because one of my tweeters keeps of cutting out and i think the crossover is blown would be gratful for the advice.
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