Check out the paraflex and super planar threads. MJM is using the exact TH modeling techniques David has just shown M1 Audio.
Hello dear David! Here's what I got. Final version. What do you think?
Hello, my good friend David!
Here's what I got:
David, would you like to add Measurements for the car?
Playing around with hornresp, which is lots of fun, my idea of a video game.
I know it is not the answer but it sure teaches you how things work. To learn the trends of what happens when one changes parameters has been a great help to me. Thanks very much, Mr. Mc Bean.
I had never considered the possibility of a petal horn, mainly because I question how rigid one can make them for a mid bass horn. In my case 90 to 500 Hz.
So I look at the calculator and see it will give one a three sided horn which I find intriguing. Since I readily admit to being nothing more than a dilettante when it comes to understanding horns it seems the triangle has a notable place in loudspeaker design, certainly for boxes.
Being basically a lazy man I like the simplicity of a three sided conical.
So what are the problems? Since I can find no one who has written about this I figure there must be a fundamental flaw.
Any guidance would be greatly appreciated.
I know it is not the answer but it sure teaches you how things work. To learn the trends of what happens when one changes parameters has been a great help to me. Thanks very much, Mr. Mc Bean.
I had never considered the possibility of a petal horn, mainly because I question how rigid one can make them for a mid bass horn. In my case 90 to 500 Hz.
So I look at the calculator and see it will give one a three sided horn which I find intriguing. Since I readily admit to being nothing more than a dilettante when it comes to understanding horns it seems the triangle has a notable place in loudspeaker design, certainly for boxes.
Being basically a lazy man I like the simplicity of a three sided conical.
So what are the problems? Since I can find no one who has written about this I figure there must be a fundamental flaw.
Any guidance would be greatly appreciated.
Interesting driver. Le isn't quoted, and that can noticeably impact response near the upper end of the passband. What do your measurements look like? Does that big null in the sim's response above 100 Hz show up in your measurements?
Hi Cubana,
Looks good to me.
Measured "room gain" data for the car interior can be imported into Hornresp, and automatically taken into account when calculating the power response.
Ang = 0.5 x Pi is normally assumed when simulating bass loudspeakers in cars.
Kind regards,
David
Looks good to me
.Measured "room gain" data for the car interior can be imported into Hornresp, and automatically taken into account when calculating the power response.
Ang = 0.5 x Pi is normally assumed when simulating bass loudspeakers in cars.
Kind regards,
David
Hi Rick,
Your comments have made my day - thanks.
(From the very beginning I was keen for Hornresp to be not only a simulator but also a learning tool, which hopefully people would find fun to use).
The following thread discusses three-sided conical horns:
http://www.diyaudio.com/forums/mult...triangular-conical-hornguide.html#post3299200
Kind regards,
David
Your comments have made my day - thanks
.(From the very beginning I was keen for Hornresp to be not only a simulator but also a learning tool, which hopefully people would find fun to use).
The following thread discusses three-sided conical horns:
http://www.diyaudio.com/forums/mult...triangular-conical-hornguide.html#post3299200
Kind regards,
David
Hi Etocynned,
For most vehicle installations it would seem safe to assume a "corner location" for the bass loudspeaker. In such cases the measured cabin gain should be added to the calculated Ang = 0.5 x Pi response.
You may find the following link of interest: Car Audio Cabin Gain Transfer Function
Kind regards,
David
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Thanks, Mr. McBean,
I was hoping that would have been more useful.
I see no need for a round throat since I am using a woofer and not a compression driver. Seems most of the responses on that thread were concerned with compression drivers. I use a big round horn for my compression driver, too.
Any further thoughts?
So I guess I must ask: do you think this could have any merit or is a waste of time?
I was hoping that would have been more useful.
I see no need for a round throat since I am using a woofer and not a compression driver. Seems most of the responses on that thread were concerned with compression drivers. I use a big round horn for my compression driver, too.
Any further thoughts?
So I guess I must ask: do you think this could have any merit or is a waste of time?
Hi Rick,
An exponential horn of equivalent size is likely to have a better low-frequency performance than a conical horn, due to the more favourable acoustical impedance loading conditions at the throat. Also, the directivity characteristics of a three-sided horn (exponential or conical) could be rather "unpredictable", I suspect.
Are you perhaps in a position to construct a "quick and dirty" prototype, to see how it performs? It would be a good learning experience, either way
.There don't appear to be too many three-sided conical horns around the place though, which probably tells us something about the design...
Kind regards,
David
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@ Rick
If you are really interested get yourself some cardboard and make one up. It is easy to cut and fold and will work for a prototype.
My suspicion is that the three sided conical will be rather disappointing compared to a proper exponential. The exponential can be foursided and still be a great performer.
If you are really interested get yourself some cardboard and make one up. It is easy to cut and fold and will work for a prototype.
My suspicion is that the three sided conical will be rather disappointing compared to a proper exponential. The exponential can be foursided and still be a great performer.
Thanks for the help!
I figure one could build a three sided horn with any flare - the question is how would it sound. Yes, i guess, if I really want to know I am going to have to build it myself.
Within hornresp one does not see a compelling reason to NOT use the conical flare in the 90 to 500 Hz range. All of the "windows" look about the same for both hypex and conical. Of course, I know there is more magic involved in making a good horn than getting a nice response curve with hornresp. But it does point you in the right direction!
I have yet to look at the foam core thread but wonder how a mid bass horn would perform with foam core, even for a simple trial. I could see getting by with it for a high frequency horn but I need to take a look at the thread.
Nonetheless, thanks!
I figure one could build a three sided horn with any flare - the question is how would it sound. Yes, i guess, if I really want to know I am going to have to build it myself.
Within hornresp one does not see a compelling reason to NOT use the conical flare in the 90 to 500 Hz range. All of the "windows" look about the same for both hypex and conical. Of course, I know there is more magic involved in making a good horn than getting a nice response curve with hornresp. But it does point you in the right direction!
I have yet to look at the foam core thread but wonder how a mid bass horn would perform with foam core, even for a simple trial. I could see getting by with it for a high frequency horn but I need to take a look at the thread.
Nonetheless, thanks!
The shorter the horn, and the smaller the ratio between mouth area and throat area, the more similar the horn profiles will perform.