I'm wondering why Boxsim V.2.00 asks for the shape of the diaphragms.
Is this used by the software to estimate the offset of the acoustic centers, given the driver shape and its diameter?
If not, should I consider the offset of the acoustic centers of the drivers under "the position of sound to listener" field?
If the woofer and tweeter positions to the listener are not equal, even a delta of few millimeters mess up the entire simulation, hence I hope that the program calculates the offset of the acoustic centers itself.
Is this used by the software to estimate the offset of the acoustic centers, given the driver shape and its diameter?
If not, should I consider the offset of the acoustic centers of the drivers under "the position of sound to listener" field?
If the woofer and tweeter positions to the listener are not equal, even a delta of few millimeters mess up the entire simulation, hence I hope that the program calculates the offset of the acoustic centers itself.
The cone shape is asked, because domes and cones have a different off axis radiation.
The acoustic offset can be entered when editing the driver data. Then the entered acoustic amplitude / phase response should be minimum phase. Alternatively, the acoustic offset can be captured in the measured acoustic phase responses. Then the acoustic offset in Boxsim should be set to zero, otherwise it is taken into account twice.
The acoustic offset can be entered when editing the driver data. Then the entered acoustic amplitude / phase response should be minimum phase. Alternatively, the acoustic offset can be captured in the measured acoustic phase responses. Then the acoustic offset in Boxsim should be set to zero, otherwise it is taken into account twice.
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Where and how (in BoxSim V2) if I don't have the driver's acoustic phase data in my hand ??
Thanks.
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For a 2 way can I:
1) trace the frequency response & impedance real values from datasheet curves of both drivers (using a curve-tracer)
2) import into VACS and get minimal phase from both response/impedance for both drivers
3) import into Boxsim values and minimal phase, acoustic and electrical
4) set "SEO field" equal to the acoustic center offset for both the drivers (approx. the spider/magnet position)
5) play with "position of sound to the listener" field to adjust backwards the position of the tweeter in respect to the position to the woofer if I mount them in a multibox system.
I did in that way, but not sure if correct (measurements are quite matching).
1) trace the frequency response & impedance real values from datasheet curves of both drivers (using a curve-tracer)
2) import into VACS and get minimal phase from both response/impedance for both drivers
3) import into Boxsim values and minimal phase, acoustic and electrical
4) set "SEO field" equal to the acoustic center offset for both the drivers (approx. the spider/magnet position)
5) play with "position of sound to the listener" field to adjust backwards the position of the tweeter in respect to the position to the woofer if I mount them in a multibox system.
I did in that way, but not sure if correct (measurements are quite matching).
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I am a longtime user of Boxsim. Just because I've seen three times that the simulation result is almost identical to real measurements (no Visaton drivers, only Zaph meauserments drivers in simulations). That's enough for me to have full confidence in Boxsim.
But the new Boxsim 2.0 is by no means "working well" with my old Dell tower OptiPlex 780 PC.
But I still use the old V1.2 when I need it. And I'm satisfied 🙂
Best diying
But the new Boxsim 2.0 is by no means "working well" with my old Dell tower OptiPlex 780 PC.
But I still use the old V1.2 when I need it. And I'm satisfied 🙂
Best diying
Is correct to use VACS and import minimal phase? How do you input the offset/SEO if you don't have the acoustic phase?
Where do people get the acoustic phase for BoxSim?😡
Is VACS minimal phase extrapolation process enough?
VACS - Home.😕
It is well known that there is a 1:1 relationship between the magnitude response of a system and its minimum phase (Hilbert trans.)
If I load into Boxsim the minimal phase, should I set both SEO (for the each driver's acoustic centre, usually the middle point between the spider and the magnetic top plate) and set the "position of listener" (for any phisical offset between the mounting frames - at basket holes - of the two drivers when they are mounted on stepped panels or tilted)?😕
Any double counting?
Is VACS minimal phase extrapolation process enough?
VACS - Home.😕
It is well known that there is a 1:1 relationship between the magnitude response of a system and its minimum phase (Hilbert trans.)
If I load into Boxsim the minimal phase, should I set both SEO (for the each driver's acoustic centre, usually the middle point between the spider and the magnetic top plate) and set the "position of listener" (for any phisical offset between the mounting frames - at basket holes - of the two drivers when they are mounted on stepped panels or tilted)?😕
Any double counting?
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