Hello,
Some weeks ago I launched a query on whether it would be possible to interchange the 2445 diaphragm with the 2447 one. You told me, it would at least not smash the phase plug. Well, it didn't.
The result is stunning. I measured both dias mounted to a 2447 driver attached to 2352 horn. In the range from 5kHz up the ribbed 2447 dia is more efficient than the plain 2445. The motivation to interchange the dias was a suck out with the original 2447 at 10kHz. Using the 2445 dia solves the problem in that frequencies around 10k are attenuated. The suck out shows to be a lift that unfortunately ommits the 10kHz area. O/k, plus some extra dB or two.
What would have come next was a try with the 2445 driver equiped with the 2447 dia. I can't do so. It was of no use to investigate a raw driver on the kitchen table. And I'm told not to mention my EV HP940 ever again. In spite of I could remount my 2360, but that's a huge issue.
regards
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