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Thank you all! You're GREAT! :applaud::bouncy:

Hi All!
Does anyone know what is the exact impedance of 2404H at 12 KHz??
I can not read the value on the chart documentation.
It looks like 10 ohms.
Can anyone confirm?
I want to achieve a...

Well, maybe, I don't know... :confused:

Hi ratitifb!
First of all,I had difficulties to open it because of the small gap between the bolt head and the stiffener rib of the horn. See. The Allen key does not pass! I have to buy a short...

Thank you for the link!
It's very interesting, unfortunatly i am not able to do the mofification by myself but it could be done by a spécialist.
The good fact is that i could buy a M552 to cut at...

I 've just received the drivers last friday.

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Hi 1audiohack!
10KHz seems not bad but in my case I have the L-pad for 4430 that reduces to 12KHz (-6dB ~ +2 dB) and this may be somewhat near the frequencies cutoff...

Hi louped garouv!
shallow slope... well why not. But if I do so I think I should cut at least at 12KHz and only in a high pass mode. Am I right?

Well it seems that my improvement does not interest many of you seen the little reading on this topic and the number of response equal to zero ...
That said, I continued my research and I think my...

Hi! Everyone.

The main part of the improvement to the 4430 is done and I am very happy with it.
Now I am planning to add a 2404H to complete the project.
My first idea was to buy a M552 for the...

Hi pos!
No not yet i've just miss this on eBay a couple of weeks ago...
But for the moment I've just ajusted the sound "by ear" with a friend of mine who is a sound ingeneer at Opéra Bastille...

Oh thank you! :D
It took quite a long time but it was worth. I think this improvement is much better than adding a 2405H as I 've seen before. Because the main axis of improvement on this very good...

Well go ahead! It's a great improvement to the 4430.
Basicly these speakers are very good. If you bi-amp them, they are going better. And with this trick it's wonderful. As I've say, I have cut at...

Well If I had a larger room the sound will be even better. But this is the next step...

http://nsm03.casimages.com/img/2010/08/01/100801074113607126500183.jpg...

All of this was made by a French carpenter from Brittany named Antoine Rouault very good job! :D

http://nsm03.casimages.com/img/2010/08/01/100801074113607126500177.jpg...

So the project is finished now and working well. The 2235H working only until 300Hz @24dB is a giant step to a better sound. I think this is one of the best improvement on the 4430. It brings more...

Some new pictures:
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Hi, I have changed my mind since I have found a M553! :D

Here's an updated view of my project :bouncy::
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Yes it is... But I've read so much information those days that I don't know what to think. It's like a brain wash! Too much information kills information! Thanks to put me on the right tracks. 14...

Well, I have received the 2123H from the US. I didn't thought it was so heavy. I have also bought a M553, I think it will be easier to find the correct balance between the speakers with this item....

Thank you Ratitifb. I have found out that it was a Molex part this afternoon but didn't know where to buy it!

Thank you for your proposal Pos ;)
But First of all I have to build the enclosures and the speakers are still in the US where my sister lives.

Good morning.
As it seems not to be easy to find a M553 crossover at decent price, I am looking further for a backup solution involving my two JBL-UREI 2 ways active crossovers (5234A and 5235) in...

Thank you for this information. ;)

Nice alignment Rob! :applaud: On my project I have 330mm between 2123H axis and 2344A throat. I wish I could do better. :D