Loudspeaker measure and crossover design - Page 2

Pano · 28th May 2012, 09:57 PM

I downloaded and will give it a try.

05? You're in the Alps?

05cordie · 9th July 2012, 12:57 PM

Hello,
Sorry to see your message only today... I'm not in the Alps, I'm living near Nancy. The 05 is because of the year. If you want to test the optimization tool, I need to know your Site Code and Machine Id, wich are available when you click on the "optimize" button in the software (Simulation and optimization interface).
I you have any question, feel free to ask it...

jayam000 · 17th August 2012, 01:19 PM

Thanks for software.
today i have downloaded & will install shortly.
Have u made any user manual/guideline so that we can use software properly.

05cordie · 17th August 2012, 05:15 PM

Tutorials are available here : Learn how to use the loudspeaker design software Sofmea
If you have further questions, feel free to ask it per mail or here on the forum.

jaya000 · 18th August 2012, 07:31 AM

I want to make crossover for 2 way PA cabinet. Do i need to measure frequency & phase response of the drivers installed in the cabinet or without cabinet? Further if need to measure just drivers without cabinet, in that case the compression driver frequency response is to be measured with the horn fitted?

jaya000 · 18th August 2012, 08:10 AM

Is it ok to take impedance curve of compression driver fitted on a horn?

05cordie · 18th August 2012, 09:14 AM

You have to measure the drivers in the cabinet in order to take the cabinet effect into account and to build a crossover that match this effect.

"Is it ok to take impedance curve of compression driver fitted on a horn?"
I would give you the same answer : you have to get the impedance of the driver in the cabinet with the horn because it impacts the impedance curve.

jaya000 · 18th August 2012, 10:57 AM

Thanks for your prompt & informative reply.

jaya000 · 20th August 2012, 05:43 PM

How to measure impedance of two same woofers in one box?

05cordie · 08:11 AM

If the two woofers are in line, you have to measure the two woofers at the same time, that is to say : mesure between the minus of the first woofer and the plus of the second, nd link the woofers with the other plus and minus... Then you have to consider you have only one driver.
If they are in parallel, but on the same crossover filter : measure them at the same time too... But take the plus and the minus of only one driver (the second driver is directly linked to the first)
If they are not or will not be linked to the same crossover : measure them separately.

6th September 2012, 08:07 AM	#20
05cordie diyAudio Member Join Date: Mar 2012	If the two woofers are in line, you have to measure the two woofers at the same time, that is to say : mesure between the minus of the first woofer and the plus of the second, nd link the woofers with the other plus and minus... Then you have to consider you have only one driver. If they are in parallel, but on the same crossover filter : measure them at the same time too... But take the plus and the minus of only one driver (the second driver is directly linked to the first) If they are not or will not be linked to the same crossover : measure them separately. Last edited by 05cordie; 6th September 2012 at 08:11 AM.

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28th May 2012, 09:57 PM	#11
Pano diyAudio Moderator Join Date: Oct 2004 Location: Milliways Blog Entries: 4	I downloaded and will give it a try. 05? You're in the Alps?

9th July 2012, 12:57 PM	#12
05cordie diyAudio Member Join Date: Mar 2012	Hello, Sorry to see your message only today... I'm not in the Alps, I'm living near Nancy. The 05 is because of the year. If you want to test the optimization tool, I need to know your Site Code and Machine Id, wich are available when you click on the "optimize" button in the software (Simulation and optimization interface). I you have any question, feel free to ask it...

17th August 2012, 01:19 PM	#13
jayam000 diyAudio Member Join Date: Apr 2009	Thanks for software. today i have downloaded & will install shortly. Have u made any user manual/guideline so that we can use software properly.

17th August 2012, 05:15 PM	#14
05cordie diyAudio Member Join Date: Mar 2012	Tutorials are available here : Learn how to use the loudspeaker design software Sofmea If you have further questions, feel free to ask it per mail or here on the forum.

18th August 2012, 07:31 AM	#15
jaya000 diyAudio Member Join Date: Dec 2006	I want to make crossover for 2 way PA cabinet. Do i need to measure frequency & phase response of the drivers installed in the cabinet or without cabinet? Further if need to measure just drivers without cabinet, in that case the compression driver frequency response is to be measured with the horn fitted?

18th August 2012, 08:10 AM	#16
jaya000 diyAudio Member Join Date: Dec 2006	Is it ok to take impedance curve of compression driver fitted on a horn?

18th August 2012, 09:14 AM	#17
05cordie diyAudio Member Join Date: Mar 2012	You have to measure the drivers in the cabinet in order to take the cabinet effect into account and to build a crossover that match this effect. "Is it ok to take impedance curve of compression driver fitted on a horn?" I would give you the same answer : you have to get the impedance of the driver in the cabinet with the horn because it impacts the impedance curve.

18th August 2012, 10:57 AM	#18
jaya000 diyAudio Member Join Date: Dec 2006	Thanks for your prompt & informative reply.

20th August 2012, 05:43 PM	#19
jaya000 diyAudio Member Join Date: Dec 2006	How to measure impedance of two same woofers in one box?