How to minimize grill diffraction - Page 2

BillFitzmaurice · 13th July 2004, 01:05 PM

No, because the frame is merely an extension of the baffle and the diffraction characteristic will be defined by its shape at its outer edges, not where it meets the driver frame.

Svante · 13th July 2004, 06:09 PM

So as I understand it, you'd have to have a varying thickness of the frame, like in 2. The mounting as in 1 would give the circular edge around the tweeter, which is bad. As I see it there are no other options if the dome extends in front of the baffle. Otherwise the dome would touch the fabric, right?

BillFitzmaurice · 13th July 2004, 06:25 PM

Yes, 2 is how I'd do it. I'd make the relief in a circular shape, like a very short waveguide. That way you're not going to affect the woofer.

Another option would be to mount the tweeter flush and use some tensioning rods across the frame face to form the grillecloth in a semi-circular shape spaced off the frame, something akin to the suggestion above but not so radical in its depth.

13th July 2004, 06:09 PM	#12
Svante diyAudio Member Join Date: Feb 2004 Location: Stockholm	So as I understand it, you'd have to have a varying thickness of the frame, like in 2. The mounting as in 1 would give the circular edge around the tweeter, which is bad. As I see it there are no other options if the dome extends in front of the baffle. Otherwise the dome would touch the fabric, right? __________________ Simulate loudspeakers: Basta! Simulate the baffle step: The Edge

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13th July 2004, 01:05 PM	#11
BillFitzmaurice Banned Join Date: May 2004 Location: New Hampshire	No, because the frame is merely an extension of the baffle and the diffraction characteristic will be defined by its shape at its outer edges, not where it meets the driver frame.

13th July 2004, 06:25 PM	#13
BillFitzmaurice Banned Join Date: May 2004 Location: New Hampshire	Yes, 2 is how I'd do it. I'd make the relief in a circular shape, like a very short waveguide. That way you're not going to affect the woofer. Another option would be to mount the tweeter flush and use some tensioning rods across the frame face to form the grillecloth in a semi-circular shape spaced off the frame, something akin to the suggestion above but not so radical in its depth.

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