This chart gives you the response, whether in free air or in a closed box, of various of Q.
Free air = Qts
Closed Box = Qtc
For example, if the Qtc or Qts of your speaker is .5, you can see that it will be 6 dB down from the midpoint. Other values are given, so you can judge the response shape of most any speaker and box combo you are likely to encounter.
This is taken from an article in the Journal of The Audio Engineering Society by Richard Small.
The article is Closed Box Loudspeaker Systems Part 1: Analysis.
It is in the December 1972 issue. Also in the Loudspeaker Anthology Collection, Part 1 of the Journal of the Audio Engineering Society.
I took Richard Small's graph and caption and added some additional labelling, which is in color. Mr. Small is known for the Thiele-Small parameters, as well as many other pioneering contributions to loudspeaker design.
Free air = Qts
Closed Box = Qtc
For example, if the Qtc or Qts of your speaker is .5, you can see that it will be 6 dB down from the midpoint. Other values are given, so you can judge the response shape of most any speaker and box combo you are likely to encounter.
This is taken from an article in the Journal of The Audio Engineering Society by Richard Small.
The article is Closed Box Loudspeaker Systems Part 1: Analysis.
It is in the December 1972 issue. Also in the Loudspeaker Anthology Collection, Part 1 of the Journal of the Audio Engineering Society.
I took Richard Small's graph and caption and added some additional labelling, which is in color. Mr. Small is known for the Thiele-Small parameters, as well as many other pioneering contributions to loudspeaker design.
Attachments
For playing around with such types of curves for a special chassis
i like to play around with Basscad from K. Föllner.
You can enter values with the Thieles of your speaker and see it on
the fly.
The crossover simulation is neat also, cause you can switch around
on the fly also.
His site is "Selfmadehifi", unfortunately the software is only german,
but who cares with all this numbers!?
http://www-user.tu-cottbus.de/~foellnk/hifisite.htm
Wombat
i like to play around with Basscad from K. Föllner.
You can enter values with the Thieles of your speaker and see it on
the fly.
The crossover simulation is neat also, cause you can switch around
on the fly also.
His site is "Selfmadehifi", unfortunately the software is only german,
but who cares with all this numbers!?
http://www-user.tu-cottbus.de/~foellnk/hifisite.htm
Wombat
There are several response plotting programs that give the response of a single driver in a single enclosure.
Subwoofer Simulator by our very own F4ier is one.
http://www.geocities.com/f4ier/speaker.htm
WinISD is another.
http://www.linearteam.dk/
I shall download BassCAD and try it. I agree with you that when you are dealing with numbers, it should not matter if you speak German or not.
Subwoofer Simulator by our very own F4ier is one.
http://www.geocities.com/f4ier/speaker.htm
WinISD is another.
http://www.linearteam.dk/
I shall download BassCAD and try it. I agree with you that when you are dealing with numbers, it should not matter if you speak German or not.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.