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08-10-2009, 07:38 PM | #1 | |
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Need volumes checked on Bandpass Box please!
Here is my bandpass box design to fit my '02 Eclipse GT trunk.
It should come VERY CLOSE to: 2.7 cu ft - front ported chamber 1.3 cu ft (each)- sealed rear-fire chamber I need someone who is really good with math to check my work here, please... Thanks!! |
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08-11-2009, 12:13 AM | #2 | |
Audio Guy
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Re: Need volumes checked on Bandpass Box please!
honestly I have NO idea how this would fit together. Did you remember to subtract the volume of the driver from each of the diver enclosures ? and subtract the volume of the ports from the ported chamber ?
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08-11-2009, 11:52 AM | #3 | ||
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Re: Need volumes checked on Bandpass Box please!
Quote:
Now, can anyone solve this? The hardest part is in the corners. Where it makes an angle (I think a 49 degree) then goes 11 inches, then angles again (41 degree I believe) so it equals out to 90 degrees. But during that 11 inches, the other two sides of the invisible 'triangle' it makes inside the box must be 8 1/4 & 7 1/4. But will the thickness of the wood take any of this away? once we divide the internals up into triangles and cubes, then it becomes easier to reach a final volume. if I am correct in thinking the inside of the 'triangles' will be 8 1/4 & 7 1/4 then this is how I'd come to the final volume: A right triangle is merely half of a cube, but since we have two of them, no need to divide by two. 8.25 x 7.25 x 12.25 (height) = 732.703125 (triangle parts volume) 3.75 x 35 x 12.25 = 1607.8125 (rectangular cube underneath triangles) 8.25 x 20.5 x 12.25 = 2071.78125 (rectangular cube between triangles) 1.5 x 8.75 x 20.5 = 269.0625 (add-on box in the front) total = 4681.359375 (cubic inches)/ 1728 = 2.70912 cubic feet the sealed chambers are the easiest and are also identical. 17.125 x 10.75 x 12.25 = 2255.1484375 / 1728 = 1.305 If I did this right, and used the right numbers (you should be able to check the angles and make sure I did it right) then my box would be green lighted for building. Thanks for all your help in advance! Last edited by tomgiboney; 08-22-2009 at 09:52 AM. |
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08-11-2009, 04:43 PM | #4 | |
Audio Guy
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Re: Need volumes checked on Bandpass Box please!
I am still having a hard time seeing the box as a finished product, so the angles and everything just don't seem to make much sense to me. Bandpass boxes are very picky about volumes, I think you made a poor choice for a box that has to meet such odd angles and sizes. Even worse, the "perfect" box size will NOT take into account it's interaction with the cars interior. All I can say is, good luck getting it just right on the first try.
P.S. don't forget about subtacting the driver volumes and port volumes. |
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08-11-2009, 05:57 PM | #5 | ||
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Re: Need volumes checked on Bandpass Box please!
Quote:
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08-22-2009, 09:49 AM | #6 | |
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Re: Need volumes checked on Bandpass Box please!
I thought this place was to help people out with their dilemmas. I guess we don't have any scholarly types here, or even anyone smart enough to give it a try. This is a challenge, yes. Are you ALL going to pass it up because the math is too scary?
This box will work out just fine as a finished product, and excuse me, but did I ask for critiques or opinions? No, I did not! I asked for help on finding the VOLUMES, that's it! I'm sorry if you 'can't see it as a finished product' but that's entirely on you and your lack of intelligence, NOT ME. So either PUT UP or SHUT UP. |
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08-22-2009, 10:42 AM | #7 | |
Audio Guy
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Re: Need volumes checked on Bandpass Box please!
whoa ... what's ip with all the hostility ?
What I am not seeing is the other like 10-12 panels of wood you will be using. It's easy for you to see because you sketched it out. Looks like the bottom 2 panels in the diagram are the same piece, I have no idea what the top figure is. Perhaps you could sketch 3 or 4 3D type diagrams so I could "see" what you are trying to do. |
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Tags |
bandpass , box , design , subwoofer , volume |
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