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Enclosure Design & Construction
homemade bandpass.. design suggestions?
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<blockquote data-quote="Savant" data-source="post: 104744" data-attributes="member: 546108"><p>To get the files smaller, open them in some app (like Paint Shop Pro, or what ever you have) and reduce the size.. Make it something like 300x240 (or what ever ratio you would get, most apps let you keep the current aspect.. you set one value and it calculates the other).. Also, it's probably a .bmp, change the type to .jpg (that's compressed compared to .bmp).. and you can try to reduce the number of colors.. if it's at 16 Mil, set it to 32K for example..</p><p></p><p>As far as other port locations, I have no idea.. You really should see how much space you have between ports and see if you can make them larger.. If you have the room, you might only make the outer two bigger.. like this</p><p></p><p>| O o O |</p><p></p><p>Ideally, you would keep them all the same size I think (and I'm not sure you can properly tune with different port sizes, but I don't see why not as long as the lengths match the diameters for the note).. You don't need 'more' ports, you need bigger ports (if you can swing it).. more ports could help, but the idea isn't to make as many holes as you can, it's get rid of the wind noise... If you can do that on 3 by making them bigger... Also, if you can 'easily' change the piece that has the ports in it, you could put in new wood and make 2 ports instead of 3, each would be much bigger.. Depending on size of woofers and power into them, you might want 3" or bigger diameters for each port (on 2).. If you can't replace the top easily, you might still try making the existing ports bigger..</p><p></p><p>Hope that helps..</p></blockquote><p></p>
[QUOTE="Savant, post: 104744, member: 546108"] To get the files smaller, open them in some app (like Paint Shop Pro, or what ever you have) and reduce the size.. Make it something like 300x240 (or what ever ratio you would get, most apps let you keep the current aspect.. you set one value and it calculates the other).. Also, it's probably a .bmp, change the type to .jpg (that's compressed compared to .bmp).. and you can try to reduce the number of colors.. if it's at 16 Mil, set it to 32K for example.. As far as other port locations, I have no idea.. You really should see how much space you have between ports and see if you can make them larger.. If you have the room, you might only make the outer two bigger.. like this | O o O | Ideally, you would keep them all the same size I think (and I'm not sure you can properly tune with different port sizes, but I don't see why not as long as the lengths match the diameters for the note).. You don't need 'more' ports, you need bigger ports (if you can swing it).. more ports could help, but the idea isn't to make as many holes as you can, it's get rid of the wind noise... If you can do that on 3 by making them bigger... Also, if you can 'easily' change the piece that has the ports in it, you could put in new wood and make 2 ports instead of 3, each would be much bigger.. Depending on size of woofers and power into them, you might want 3" or bigger diameters for each port (on 2).. If you can't replace the top easily, you might still try making the existing ports bigger.. Hope that helps.. [/QUOTE]
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homemade bandpass.. design suggestions?
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