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Old 11th July 2003, 01:03 PM   #1
Vikash is offline Vikash  United Kingdom
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Question Diffraction/Rounded Baffle

On the Curve Sided Loudspeaker page posted a short time ago, the transverse lamination examples have flat baffles...

I want to incorporate this lamination method into my design but was wandering why the enclosures shown have stopped short of going for a full rounded baffle - which would have helped further reduce diffraction effects. Or is this incorrect?
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Old 11th July 2003, 01:42 PM   #2
7V is offline 7V  United Kingdom
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Default Re: Diffraction/Rounded Baffle

Quote:
Originally posted by Vikash
I want to incorporate this lamination method into my design but was wandering why the enclosures shown have stopped short of going for a full rounded baffle - which would have helped further reduce diffraction effects. Or is this incorrect?
Personally, I went as far as I could with the rounding. Just couldn't get round the fact that you need a flat surface to mount the drive-units to.

Other than that, you have to juggle height, depth, width and wall thickness to end up with the right volume.

Good luck with your Translams, Vikash. Post us any drawings or photos when you have them.

Steve
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Old 12th July 2003, 12:56 AM   #3
Vikash is offline Vikash  United Kingdom
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Hello Steve,

Quote:
...need a flat surface to mount the drive-units
Just thought i'd bounce an idea of you...

The driver would only be flush on part of the baffle. Don't know if i'm gaining something or losing something. Certainly looks cool
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Old 12th July 2003, 01:22 AM   #4
7V is offline 7V  United Kingdom
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And is that an egg shape inside?

I love it.
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Old 12th July 2003, 01:31 AM   #5
Vikash is offline Vikash  United Kingdom
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Still awake and on the forum like a true fanatic i see

It's egg all the way! Outside for diffraction, inside for standing waves.
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Old 12th July 2003, 01:45 AM   #6
7V is offline 7V  United Kingdom
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Stunning. What's the driver?
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Old 12th July 2003, 01:53 AM   #7
Vikash is offline Vikash  United Kingdom
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I've decided on the Seas W22EX002. Tweeter yet to be decided. Choices are reduced due to the low cut off required for the mid range. And it doesn't help that I have no crossover designing experience. Well, one thing at a time.

It's as much about the journey as the ending right...
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Old 12th July 2003, 03:44 AM   #8
Variac is offline Variac  United States
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The downside of course are the sharp edges in front of the driver.

I guess I would have a short cylinder extending out to the frontmost edge of the curved baffle so the top and bottom of the cylinder would extend the same as the baffle but the sides would be a couple of inches long. Then mount the driver in the end of the cylinder. Inside and outside eggs seem the way to go....
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Old 12th July 2003, 04:16 AM   #9
EC8010 is offline EC8010  United Kingdom
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Heavily chamfer the front edges to the driver? Do that, and you won't have egg all over your face.
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Old 12th July 2003, 06:06 AM   #10
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correct me if I'm wrong, but the sharp edges in front of the driver won't be *much* of a problem if the driver is crossed over fairly low...

though, if you're going for full-range, maybe that's not an option.

*shrug*
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