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Old 11th January 2014, 08:21 PM   #1
kendt is offline kendt  Canada
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Default Using "The Edge"

Ive been playing around with the edge software to see what kind of results I could get using four mid drivers on an OB. Oddly enough the best looking response was with the drivers in a semi circle close to the inside edge. It looked pretty promissing.

I realize its only a starting point but is the software fairly accurate? Does it assume the response of the drivers to be flat?

Im just curious how far off the results might actually be in real life.
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Old 12th January 2014, 01:15 PM   #2
Juhazi is offline Juhazi  Finland
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Yes Edge assumes flat response from drivers.

Did you try to simulate off-axis behaviour too? How high are you planning to cross to tweeter?

In an open baffle, directivity changes may get very interesting - a mix of dipole function/dispersion and driver diameter/group width determined dispersion. Usually we have a transition zone between these, with minimal directivity.
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Old 12th January 2014, 03:37 PM   #3
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Default Diffraction & Boundary simulator

You could also try Jeff Bagby's "Diffraction & Boundary simulator" (Excel base). I used both Edge and his program to design my OB. I started with the Lowther LOB and adapted it to my needs.
Pierre
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Old 12th January 2014, 06:19 PM   #4
kendt is offline kendt  Canada
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Quote:
Originally Posted by Juhazi View Post
Yes Edge assumes flat response from drivers.

Did you try to simulate off-axis behaviour too? How high are you planning to cross to tweeter?

In an open baffle, directivity changes may get very interesting - a mix of dipole function/dispersion and driver diameter/group width determined dispersion. Usually we have a transition zone between these, with minimal directivity.
I did not try off axis yet. I assume that is done by moving the mic position.

The mids and tweets are the same as the ones used in the statements so I will just use the same xover points since its already a proven design. The drivers are quite amazing but I'd like to add more to create a bigger sound.
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Old 12th January 2014, 06:22 PM   #5
kendt is offline kendt  Canada
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Quote:
Originally Posted by crazyfrog View Post
You could also try Jeff Bagby's "Diffraction & Boundary simulator" (Excel base). I used both Edge and his program to design my OB. I started with the Lowther LOB and adapted it to my needs.
Pierre
Thanks! I looked at that software but didnt try it. Solen doesnt have the drivers in stock right now so I have some time before I can order the rest, so that will give me time to try it and compare the results.
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Old 12th January 2014, 06:56 PM   #6
kendt is offline kendt  Canada
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I did some more quick sims with the mic at various positions. It seems all the results show that the off axis response only affects the frequencies that are far outside the xover point. I would post the results but dont know how!
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Old 14th January 2014, 12:00 PM   #7
Juhazi is offline Juhazi  Finland
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Hi,
you can "lock" a measurement, then move the mic - lock result etc.

Then, press Shift-PrintScreen, go to your favourite Photo editor and paste the screen capture! I use PhotoScape Photoscape : Free Photo Editing Software (Photo Editor) Download
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Old 14th January 2014, 02:42 PM   #8
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