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RE: Should we send a "representative" to Magnepan?

Well, the standard D'Apollito implementation does space the drivers as tightly as possible. They also usually use the 4th order L-R, which has a pretty broad central lobe. And the axial lobes are symmetrical and vertical.

Of course, you have lobing with the standard Tympani configuration, too, and it's going to have axis tilt. But didn't you say that you had trouble crossing the ribbon high up because of the separation between the ribbon and mid? With a crossover of 300 you're going to have significant output at frequencies at which separation is greater than wavelength.

Didn't know people had tried a centered configuration. My main question was always about low frequency acoustical modulation of the ribbon tweeter and whether it wouldn't cause Doppler distortion or even failure. I don't think you could just take the mid and tweeter, put them next to one another, and remove all the space, although it would be great if you could. But I'm just speculating here, there has to be a reason why they separate the ribbon tweeters as they do -- from the perspective of blending and crossover design, you'd want them to be as close together as possible.

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