Hornresp

David McBean · 2012-02-06 7:22 am

mimura said:
Help analyze. The Sim's look at what's wrong or not.

Hi mimura,

Your design looks okay to me.

Others with more practical experience may wish to comment further.

Kind regards,

David

David McBean · 2012-02-06 7:50 am

mimura said:
Help analyze. The Sim's look at what's wrong or not.

Hi mimura,

Your design looks okay to me.

Others with more practical experience may wish to comment further.

Kind regards,

David

Jmmlc · 2012-02-06 9:01 am

Hello David,

Seems OK to me too.

Still the problem of the inverted phase on the phase graph ... (wrap around + and -180° and not around 0°).
Though the calculated impulse response has the correct polarity (could be only a problem with which phase is diplayed: uncrorected or corrected...).

Best regards from Paris

Jean-Michel Le Cléac'h

David McBean said:
Hi mimura,

Your design looks okay to me.

Others with more practical experience may wish to comment further.

Kind regards,

David

jamikl · 2012-02-06 9:50 am

I have been away from the forums, and the internet, as I relocated from Melbourne to Russell Island in Moreton Bay, Queensland. I got back online on Saturday and find I am unable to connect to David McBean's new link. Well, I think its a new one. I had no problems before. I use windows 7 and Google Chrome but have tried IE well. Is my PC lacking something? I'm looking forward to any help.
jamikl

tb46 · 2012-02-06 2:49 pm

Posts #2538 and 2540

Hi David,

I just had to ask. Thanks for the explanation and the example, one question though: when setting the Sd in your example to 0.5*Sd do I leave all the other parameters as they were with a single driver?

Regards,

bjorno · 2012-02-06 3:23 pm

tb46

Posts #2538 and 2540

Hi David,..I just had to ask. Thanks for the explanation and the example, one question though: when setting the Sd in your example to 0.5*Sd do I leave all the other parameters as they were with a single driver?

Hi Oliver,

They will change too in a IMO weird way as BL Rms and Mmd will be UN-recognizable if doing a real world measurement.

b

bjorno · 2012-02-06 4:25 pm

Time out exceeded for editing the picture...Here is the one I hope not is confusing and replaces the one here above.

b

bjorno · 2012-02-06 5:19 pm

Last: Placing the drivers in different closed enclosure volumes:

b

tb46 · 2012-02-06 7:42 pm

Hi bjorno,

Thanks. I'll just stay with my old method of calculating the values for an isobaric pair, and treating it like a single driver in Hornresp.

Regards,

David McBean · 2012-02-07 7:05 am

tb46 said:
when setting the Sd in your example to 0.5*Sd do I leave all the other parameters as they were with a single driver?

Hi Oliver,

Yes.

The other parameter values will be automatically adjusted as necessary when 2P or 2S is selected using the Driver Arrangement tool.

Kind regards,

David

David McBean · 2012-02-07 7:26 am

bjorno said:
They will change too in a IMO weird way as BL Rms and Mmd will be UN-recognizable if doing a real world measurement.

Hi bjorno,

I am not sure how to interpret the results you have posted

.

To establish a starting point reference - what are the theoretical parameter values for a single Audiobahn AW1251SE driver?

Thanks.

Kind regards,

David

David McBean · 2012-02-07 7:31 am

tb46 said:
I'll just stay with my old method of calculating the values for an isobaric pair, and treating it like a single driver in Hornresp.

Hi Oliver,

I would be very interested to know what method you use to calculate the single driver equivalent parameter values for an isobaric pair. Thanks.

Kind regards,

David

David McBean · 2012-02-07 7:47 am

jamikl said:
I got back online on Saturday and find I am unable to connect to David McBean's new link.

Hi jamikl,

The current Hornresp link is Hornresp. The webpage is very kindly hosted by Sabbelbacke in Germany.

I have noticed that file download times have been significantly slower over the past week or so, but I don’t know the reason why.

Do you have a dial-up or a broadband Internet connection?

Kind regards,

David

David McBean · 2012-02-07 8:05 am

Jmmlc said:
Seems OK to me too.
Still the problem of the inverted phase on the phase graph ... (wrap around + and -180° and not around 0°).

Thanks Jean-Michel.

I have no idea why my reply to mimura was posted twice, 28 minutes apart

.

I get the phase response shown below - isn't this correct?

It seems to be wrapped around 0 degrees okay.

Kind regards,

David

Jmmlc · 2012-02-07 8:35 am

Hello David,

Your phase graph is correct.

Here is the one I obtained with the new version of Hornresp downloaded few minutes ago.

Attached is the Hornresp record mimura.txt I used.

Best regards from Paris, France

Jean-Michel Le Cléac'h

David McBean said:
Thanks Jean-Michel.

I have no idea why my reply to mimura was posted twice, 28 minutes apart .

I get the phase response shown below - isn't this correct?

It seems to be wrapped around 0 degrees okay.

Kind regards,

David

David McBean · 2012-02-07 9:44 am

Jmmlc said:
Here is the one I obtained with the new version of Hornresp downloaded few minutes ago.

Hi Jean-Michel,

The reason for the difference in our results is that you are using the 'unmasked resonances' option and I am using the 'masked resonances' option.

I am not sure why this should have such an effect on the phase wrapping process - I need to investigate further

.

Kind regards,

David

jamikl · 2012-02-07 9:47 am

Hi David, I'm using ADSL2+. If I wait long enough I get the "Web page is not Available"message. I've been trying for three days now - same result each time. I never had any problems two and a half months ago on the same computer. Don't know what is wrong now.
jamikl

mimura · 2012-02-07 1:21 pm

Jmmlc said:
Hello David,

Your phase graph is correct.

Here is the one I obtained with the new version of Hornresp downloaded few minutes ago.

Attached is the Hornresp record mimura.txt I used.

Best regards from Paris, France

Jean-Michel Le Cléac'h

Hello David and all the members.
Thanks for the help. I do not know if it will affect projects that are going to do it. I do not know much about such details.

Thank you for good.

tb46 · 2012-02-07 2:53 pm

Post #2554 - Isobaric Driver Configuration

Hi David,

I'll attach a screen print of some notes in a spreadsheet. Using these values seems to work well enough. Please, let me know if you find any big mistakes.

Regards,

bjorno · 2012-02-07 3:48 pm

David McBean said:
Hi bjorno,

I am not sure how to interpret the results you have posted .

To establish a starting point reference - what are the theoretical parameter values for a single Audiobahn AW1251SE driver?

Thanks.

Kind regards,

David

Hi David,

A starting point reference is single coil DVC TS parameters that can be found here: The submitted picture

b

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