Hello to all members of the forum, my English is not that good,so if i make some mistake fill free to lough. Now a question. After making some speakers from open bafle ,standard BR,single driver , DML and so on, i want to do somthing new to me. I have a pair of Fostex 206E drivers, and i want to put them in a front square horn. For the low end i build two BR boxes around 80L, Horn should be from 200Hz up, and for the top i have some eminence CD in horn. Problem is, im not good in all the programs that are available ,like hornresp, its very confusing for me so i need your help. Can someone just make a calculation for me, like, mouth is 70cm by 70cm, distance from the throat is ...cm. As i read somewher two sides can be flat , and two bent. I hope i dont ask too much of you smart people. I hope that i properly explained what help i need. Thanks in advance, Dejan.
Assuming:
70 x 70 cm = ~125 Hz Sm
St = Sd
HR calcs axial length = 59.53 cm
Then in tools/directivity/response/0 deg off axis = 'flat'/2pi/~200 - 1 kHz/105 dB +/- 0.5 dB/m
Correct, see HELP file
70 x 70 cm = ~125 Hz Sm
St = Sd
HR calcs axial length = 59.53 cm
Then in tools/directivity/response/0 deg off axis = 'flat'/2pi/~200 - 1 kHz/105 dB +/- 0.5 dB/m
Correct, see HELP file
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GM thank you for the answer. I hope that i can ask some more questions, because im still confused. Can someone explane me some more things. To be clear i make some drawing .
So if im geting this right, mouth is 700 mm , throut is the size of a driver( 206 mm). What are the values of a X(distance from throat to mouth) and Y( sides of a horn lets say at every 5 cm. I realy hope i explained well my questions. Thanks in advance . Dejan
Attachment Tractrix_1.txt contains the data (at one centimetre intervals) for a square cross-section tractrix horn expanding equally in both width and height. The width and height profiles are shown in Attachments Tractrix_1W.png and Tractrix_1H.png.
Attachment Tractrix_2.txt contains the data (at one centimetre intervals) for a square cross-section tractrix horn expanding linearly in width. The width and height profiles are shown in Attachments Tractrix_2W.png and Tractrix_2H.png. The constructed horn can be rotated through 90 degrees if the top and bottom rather than the two sides are required to be flat.
Descriptions of the data file contents are given in Attachment Tractrix_Notes.png.
The tractrix horn has the following specification:
Throat cross-sectional area = 20.6 * 20.6 = 424.36 cm2
Mouth cross-sectional area = 70 * 70 = 4900.00 cm2
Horn axial length = 37.06 cm
Flare cutoff frequency = 138.62 Hz
