Hello diyer,
I would like to ask you for help on the positioning of the woofers with respect to the front baffle.
In particular, I am interested in the positioning with respect to the y-axis.
With a net height of 76cm, the first fundamental wave occurs at about 225hz.
To minimize the vertical standing waves, if I understood correctly, the woofer should be positioned between 1/4 and 3/4 of the height or between 1/3 and 2/3 of the height (acting a little less on the fundamental and a little more on the harmonics).
What is, if there is, the ideal compromise between the management of the standing waves and the minimization of the frontal lobing?
Thanks in advance to everyone.
I would like to ask you for help on the positioning of the woofers with respect to the front baffle.
In particular, I am interested in the positioning with respect to the y-axis.
With a net height of 76cm, the first fundamental wave occurs at about 225hz.
To minimize the vertical standing waves, if I understood correctly, the woofer should be positioned between 1/4 and 3/4 of the height or between 1/3 and 2/3 of the height (acting a little less on the fundamental and a little more on the harmonics).
What is, if there is, the ideal compromise between the management of the standing waves and the minimization of the frontal lobing?
Thanks in advance to everyone.
Attachments
For actual frequency response and less cancelation, mount woofer as shown, as close as possible to each of for
tight center to center.
In a box or rectangle the longest area is the " uh oh" region. That gets fixed with absorption material.
For offset no distance should be equal. Which helps with diffraction
Golden ratio or something close often used. for cabinet shape and driver placement towards one edge. Technically
it is 1.618. But for all the goobers that like to argue or people who simplify.
1:6 ratio or rounded up often falls closer to 1:7 so any magical division or science you want to make up close to 1:6 to 1:7 ratio
is good enough.
You can also subtract 1:6 divisions to get different shapes, the Greeks were pretty good at it.
tight center to center.
In a box or rectangle the longest area is the " uh oh" region. That gets fixed with absorption material.
For offset no distance should be equal. Which helps with diffraction
Golden ratio or something close often used. for cabinet shape and driver placement towards one edge. Technically
it is 1.618. But for all the goobers that like to argue or people who simplify.
1:6 ratio or rounded up often falls closer to 1:7 so any magical division or science you want to make up close to 1:6 to 1:7 ratio
is good enough.
You can also subtract 1:6 divisions to get different shapes, the Greeks were pretty good at it.
Since your 760mm wide or tall, whatever the orientation
Simplified golden ratio with no decimal points can be divided to
1260
*760 *
470
290
179
111
69
42
Next upward is 1260 rather tall and can subtract smaller values for more ideal height/tall
whatever orientation
1218
1191
1149
1081
* 970*
500
So your 970 dimension is a rather good choice actually
970
599
371
229
142
88
54
Simplified golden ratio with no decimal points can be divided to
1260
*760 *
470
290
179
111
69
42
Next upward is 1260 rather tall and can subtract smaller values for more ideal height/tall
whatever orientation
1218
1191
1149
1081
* 970*
500
So your 970 dimension is a rather good choice actually
970
599
371
229
142
88
54
Last edited:
Your application is important to know..?
I guess you mean pulling the woofers away from the range above them. It is manageable, though often spoken about critically.. but you'd have to develop the cross in the acoustic sense to see where you're at.
For this you would need to know whether you will try to avoid the region or need to play through it. Woofers in the middle raises the frequency of the first.
What frontal lobing?
I guess you mean pulling the woofers away from the range above them. It is manageable, though often spoken about critically.. but you'd have to develop the cross in the acoustic sense to see where you're at.