I have a few comments and questions.
First about the posting. I guess you are from Italy and your use some kind of text editors that user a lot styles that are not renders properly a browser with western meetings. I just would like to let you know that my posting window has a tool that will fix all formatting problems. In the right corner or “reply” interface you will see a blue “W” button that says “Clean All MS Word formatting”. It is very helpful. Also the buttons on the extreme left “Preview Window” would allow you to preview your post before submitting it.
Yes Italy
OK
Now about your tweeter. If it is not some kind of trade secret then what diaphragm you used, how did you dealt with alleged resonances and the most important how methodologically you concluded that the problems that you reportedly had were resonance-related?
Another thing, you chose to close the return magnetic system with a solid cylinder that prevents hit dissipation from electromagnet. Do you driver get too hot? Can you report it’s temperature after 3-4 hour of operation?
Sorry but I prefer not to say the brand of the diaphragms .
I used only moving parts and not the structure, the suspensions were treated with a silicone resin
The metal structure at the beginning was open but the magnetic circuit was not working well,the magnetic force of the solenoid was lost,I arrived at the solution completely closed after several prototypes.
http://audiofilofinehighendproduct.blogspot.com/search?updated-max=2010-11-08T12%3A59%3A00%2B01%3A00&max-results=7
Half an hour aftert he meta lreaches a temperature about 46 to 50 degrees(depending on ambient temperature) and the temperature remains constant, even leaving under tension.
The metal trumpet acts a sheat sink
Sorry but i dont say
Now, some more important thing. It is a pure speculative guess on my part but I would say that considering the type of the horn you use and the sensitivity numbers that you provided I can estimated that you do not saturate your gap hard enough: ether you run too little current or your use too low permeability of core. You see, this type of the horn (absolutely ridicules for a tweeter in my view) shall heave you over 10dB equalization gain. With 100% of driver efficiency and no horn EQ the sensitivity would be 111dB (1W converted at 100% to sound pressure).So, with this type of the horn and proper high saturation (for tweeter only) you shall have 118dB or even more. You might have problems to drive more current with this air-restricted electromagnet. Take a look how Cogent did their drivers – they did cooling in a very right way.
Rgs, Romy the Cat |
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