thanks Bjorno, thats interesting.
Not sure why 2 different sim programs should have such a difference in box volume for a straight forward sealed box.... It can only be the Q.
Hi 8,
Please confirm what Q you have used, I always aim for something between 0.5 and and 0.7.
The Qmakes a big difference to box volume.
Not sure why 2 different sim programs should have such a difference in box volume for a straight forward sealed box.... It can only be the Q.
Hi 8,
Please confirm what Q you have used, I always aim for something between 0.5 and and 0.7.
The Qmakes a big difference to box volume.
I let WinISD pick the box size and I changed nothing. I did this a few minutes ago with WinISD and WinISD Pro. Both defaulted to sealed box for this driver, both were a Q.707, and both delivered 1.372cu ft box size with fsc of 45.09hz.
For example, the PE site shows a sealed volume of about .71cu ft for a sealed enclosure.
I went so far as to enter all the info for the driver myself; the loudspeakerdatabase file did not pass integrity check in WinISD.
Just now I used my file against eh file from loudspeakerdatabase and while the LSD file failed integrity check the resulting box sizes and FSC were the same.
For example, the PE site shows a sealed volume of about .71cu ft for a sealed enclosure.
I went so far as to enter all the info for the driver myself; the loudspeakerdatabase file did not pass integrity check in WinISD.
Just now I used my file against eh file from loudspeakerdatabase and while the LSD file failed integrity check the resulting box sizes and FSC were the same.
Q makes all the difference
Found the reason for different box volumes.... Its got to be the Q.
i have added a third sim with a Q of 0.7 and that gives a 37 litre volume.
Found the reason for different box volumes.... Its got to be the Q.
i have added a third sim with a Q of 0.7 and that gives a 37 litre volume.
So, what is your opinion now?
I am about 90% sure I am doing the right thing to optimize my output/size for this driver.
I am about 90% sure I am doing the right thing to optimize my output/size for this driver.
Looks like the Dayton drivers will work and are good value compared to the Beyma drivers which are more expensive.
I have attached a sim using 400 watts ( to match the Dayton) with a 12 inch Beyma in under 20 litres... Impressive performance.
There is a lot of good info on the "ELF" or Extended Low Frequency subwoofer concept, check out this link :
Sub-Woofer Controller
Cheers
Alex
I have attached a sim using 400 watts ( to match the Dayton) with a 12 inch Beyma in under 20 litres... Impressive performance.
There is a lot of good info on the "ELF" or Extended Low Frequency subwoofer concept, check out this link :
Sub-Woofer Controller
Cheers
Alex
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