Diffraction SS9900 vs 9700

[Jonasz]

Would the shallow waveguide of the 9900 help prevent edge diffraction? Or is it just too "little" depth to the waveguide for it to be effective?

[Jonasz]

Noone have any ideas on the subject?

[Ludvig]

Since the diameter of the "waveguide" is small, I don't think it affects more than very high frequencies, where the diffraction is not that serious anyway.

[dlr]

Little, if any, change to diffraction

Would the shallow waveguide of the 9900 help prevent edge diffraction? Or is it just too "little" depth to the waveguide for it to be effective?

There may be some minor alteration of the diffraction signature. The "horn" loading is very minor, not enough to help any diffraction issues, I'm sure.

dlr

[Jonasz]

Comparing the datasheets from Tymphany of the 9900 and the 9700 (wich I understand is exactly the same tweeter except for the frontplate) it seems the waveguide gives a gain between 900hz and 6khz with 3 db gain in the 2-3khz region. Surprisingly (at least to me ) the 9900 also seems to have a few dB better offaxis respons over 10 khz.

So if using the 9900 with a cross at 2khz it should have 3 dB less distortion (after correcting for the waveguide-gain) or am I thinking wrong? And why the better dispersion in the top octave?