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Multi-Way Conventional loudspeakers with crossovers

Simulating 18sound 10nmba520 dogbox
Simulating 18sound 10nmba520 dogbox
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Old 23rd March 2020, 08:01 PM   #1
more10 is offline more10  Sweden
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Default Simulating 18sound 10nmba520 dogbox

The purpose is to simulate different dogbox designs for the 18-sound 10nmba520. This is the driver chosen by Troels Gravesen for The Loudspeaker, The-Loudspeaker

First I use Winisd to figure out a critically damped box size, and its potential maximum sound pressure.

Box size is 11,39 liters. Filter parameters are shown in diagram. System power is 130 W, cone excursion is xmax at 150 Hz.
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File Type: png 10nmba510.png (47.9 KB, 124 views)
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Old 23rd March 2020, 08:14 PM   #2
more10 is offline more10  Sweden
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First Hornresp simulation is a straight cylindrical dogbox of 500 square centimeters, 23 cm deep.

There is a nasty interference at 740 Hz
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File Type: png 10nmba510-cylindrical-dogbox.png (22.9 KB, 122 views)
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File Type: txt 10nmba520c.txt (1,020 Bytes, 2 views)
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Old 23rd March 2020, 08:19 PM   #3
more10 is offline more10  Sweden
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Next out is a parabolic dogbox. How can this be worse?
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File Type: png 10nmba510-parabolic-dogbox.png (23.3 KB, 117 views)
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File Type: txt 10nmba520p.txt (1,021 Bytes, 2 views)
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Old 23rd March 2020, 08:24 PM   #4
more10 is offline more10  Sweden
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Next out is a conical dogbox. Very much like the parabolic
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File Type: png 10nmba510-conical-dogbox.png (22.0 KB, 114 views)
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File Type: txt 10nmba520k.txt (1,019 Bytes, 1 views)
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Old 23rd March 2020, 08:34 PM   #5
more10 is offline more10  Sweden
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The last simulation is an exponential dogbox. Even lower resonance
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File Type: png 10nmba510-exponential-dogbox.png (24.1 KB, 109 views)
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File Type: txt 10nmba520e.txt (1.0 KB, 1 views)
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Old 23rd March 2020, 08:35 PM   #6
more10 is offline more10  Sweden
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These results are not what I had expected.
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Old 24th March 2020, 08:29 PM   #7
more10 is offline more10  Sweden
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With filling the simulations look much better

First out is the cylindrical dogbox.
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Old 24th March 2020, 08:29 PM   #8
more10 is offline more10  Sweden
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This is the parabolic dogbox
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Old 24th March 2020, 08:30 PM   #9
more10 is offline more10  Sweden
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The conical dogbox
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Old 24th March 2020, 08:31 PM   #10
more10 is offline more10  Sweden
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Exponential dogbox
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