I am building my first tapped horn with a 12 inch woofer calculated with hornresp
Simulation at 100w, half space radiaton. S1 = 175cm2, S4 = 500cm2. L12 and 34 are 20cm. L23 is 350cm. There is some rising spl from 40 to 70hz, but it doesn't matter. Low pass filter will be set very low, like at 40hz or something
But i have a problem. If i make the opening at the end of the line 500cm2 my driver would not fit..
Does it matter if i make this something like 700cm2 and keep the rest of the surfaces the same?
Response in hornresp changes just slightly, most at higher frequenties (box is already glued and screwed with the opening just big enough to fit the driver 😛)
An externally hosted image should be here but it was not working when we last tested it.
Simulation at 100w, half space radiaton. S1 = 175cm2, S4 = 500cm2. L12 and 34 are 20cm. L23 is 350cm. There is some rising spl from 40 to 70hz, but it doesn't matter. Low pass filter will be set very low, like at 40hz or something
But i have a problem. If i make the opening at the end of the line 500cm2 my driver would not fit..
Does it matter if i make this something like 700cm2 and keep the rest of the surfaces the same?
Response in hornresp changes just slightly, most at higher frequenties (box is already glued and screwed with the opening just big enough to fit the driver 😛)
Hi,
Doesn't look like the horn has been optimised for your intended pass band at all... oh well. Increasing S4 to solve driver mounting issues shouldn't be a problem for your application. I do question whether you understand the correlation of the dimensions in horn response to the box design though. the "S's" are not surfaces, they are horn cross section.
Regards,
Eric
Doesn't look like the horn has been optimised for your intended pass band at all... oh well. Increasing S4 to solve driver mounting issues shouldn't be a problem for your application. I do question whether you understand the correlation of the dimensions in horn response to the box design though. the "S's" are not surfaces, they are horn cross section.
Regards,
Eric
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Hi Michelp89,
Post #1: "Low pass filter will be set very low, like at 40hz or something..."
Do you have a high pass (low cut) planed, e.g.: 20Hz? The TH needs it to control the cone motion below the frequency where the cabinet unloads.
Generally, THs are pretty forgiving as to the mouth area, all else being equal.
Regards,
Post #1: "Low pass filter will be set very low, like at 40hz or something..."
Do you have a high pass (low cut) planed, e.g.: 20Hz? The TH needs it to control the cone motion below the frequency where the cabinet unloads.
Generally, THs are pretty forgiving as to the mouth area, all else being equal.
Regards,
If you cross that thing over at 40hz, you're only gonna be left with a peak at 30hz for all practical purposes.
Ok, maybe surfaces was the wrong word, but you know what i mean. I'm dutch, not american 😛
I have to admit that the response is not the best one. I also have some smaller designs (inverted) with a smoother response. But the -3db point is a bit higher there.
This subwoofer is only for something extra at movies. My front speakers give enough bass for music, but just do not get a lot lower than 40hz
High pass is not necesarry i think. It goes a 2mm over xmax below at 10hz at 100w. But still not at xmech. And i dont think i will play at such volumes
Now get my amp ready and try the horn in a couple of hours 😀
I have to admit that the response is not the best one. I also have some smaller designs (inverted) with a smoother response. But the -3db point is a bit higher there.
This subwoofer is only for something extra at movies. My front speakers give enough bass for music, but just do not get a lot lower than 40hz
High pass is not necesarry i think. It goes a 2mm over xmax below at 10hz at 100w. But still not at xmech. And i dont think i will play at such volumes
Now get my amp ready and try the horn in a couple of hours 😀
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