Ciare 250

[Nuuk]

There has been quite a lot said on these forums about the Ciare 250 10 inch driver and I have recently purchased a pair myself.

I thought that it may be a good idea to have a thread dedicated to the Ciare, so that all information about it can be collected together.

I have just got my pair into baffles and am now using them in place of the modified Goodmans 201's. At present, I would say that I prefer the 201's so my question is, how long do the take to break in and how much improvement can I expect?

[knorke]

Hi Nuuk,

the CH 250 takes quite a long time to break in.
Especially the reproduction of high frequencies improve over time.
I use the CH's heavily modified in an open baffle.
The modifications are:
- dustcap removed
- neodym magnet 30x15 mm placed on top of the pole piece (that was tricky)
- damar on cone and whizzer
- two cuts in the cone (sealed with silicone rubber)

I might post some pictures later....

[Nuuk]

Thanks Knorke, they seem like they will need quite a bit of time to break in so I'll have to vbe patient. My 201's took quite a time after they were re-built but the wait was worthwhile!

Interesting modifications! What do the two cuts sealed with silicon rubber actually do?

And yes, I'm sure that I'm not the only one who would like to see the pictures!

[Stefano]

Hi knorke, what's the dimension of your dipole? I got some ciare too and was a year that i'm will how to use 'em

[joensd]

Have a look at Norbert´s project:
'JASD' (Just A simple Dipolspeaker)
http://www.audiodiskussion.de/foren/....php?idx=12374
(for the picture)

greets & loads of fun with the driver (just heard it recently)

[knorke]

Hi,

the dimensions of my dipole are 120x74 cm ...
The two cuts damp two resonances of the cone (inspired by scan speak). After cutting the cone the resonances were completly gone but the cone buzzed at lower frequencies. So I decided to seal them with a soft material.
I will post tomorrow some pictures and measurements....

[Nuuk]

the dimensions of my dipole are 120x74 cm ...

So you are presumably using yours without a sub. I am using a sub and thinking about removing the bottom frequencies from the Ciare. My baffles are 110x55 cm.

Mine have improved quite a bit over the last 24 hours.

[knorke]

So you are presumably using yours without a sub

Actually I have a sub (closed Shiva), but the CH250 are very listenable
without it ;-) ...
On the picture you can see the two cuts and the neodym magnet placed on top of the pole piece.
More to come ( I'm a bit busy at the moment)...

[Nuuk]

Thanks for the picture. Nice to see the driver mounted neatly - ie from the back!

The 'cuts' are very interesting (the neodym magnet placed on top of the pole piece too).

[ddriveman]

Knorke,

Thanks for your insightful posts.
I think Ciare also sells versions of the CH250 with 1 or 2 additional magnets (at the rear). Have you tried or listen to these. I am curious to know what the additional magnet on the pole piece brings to your speakers.
Also, if you compare the cuts, additional magnets, removal of dust cap and application of DAMAR (could you be more specific on where and how thick DAMAR is applied), can you please rank them in terms of improvements.
Finally, how do you find the treble. Frequency response of the CH250 suggest rolloff after 16kHz. Do you find you need a supertweeter ?