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<blockquote data-quote="Moble Enclosurs" data-source="post: 7691736" data-attributes="member: 634917"><p>Well, I thought the same thing at first until the defense went up. Because normally, in a conventional design (where phase response is less sensitive), the parameters of the design will change and can be dramatic if done with multiple tuning without a removal of the displacement of the other port. Excrusion, phase, and timing effects will change, where the one with a higher tuning may be designed secondary to the lower tuning one to achieve at least a somewhat usable response down to the low 30s.</p><p></p><p>Essentially, to pull that off effectively (meaning with maintaining acoustic efficiency and output) without losing something of either one tuning idea, you would need to figure for those effects, and I know it can get complicated as far as the calculations go, unless you decide to rely on a program to do it for you, which I do not know of one that can....that I am aware of.</p><p></p><p>That is all the reason why I mentioned what I did. Because depending on what tuning you use, and what volume, placement, etc..all factors of the design, to pull that off with optimized output (not considering what one would consider just "usable" and "good enough"), then that can take some cautious planning and designing to achieve.</p><p></p><p>I have seen many times, others try to make a design with multiple ports, even with those that are removable, with sad results. And even some with usable results, but not one that has had both outputs equal in authority and passband response that was considered optimal. One will have a higher degree of distortion, and one will control the drivers excursion better.</p><p></p><p>ALl I was trying to say, was it can get pretty involved if you want it done right, so know how to do it and you will find yourself with great results.</p><p></p><p>Im not sure how that is offending anyone. Hmmmmm //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif</p></blockquote><p></p>
[QUOTE="Moble Enclosurs, post: 7691736, member: 634917"] Well, I thought the same thing at first until the defense went up. Because normally, in a conventional design (where phase response is less sensitive), the parameters of the design will change and can be dramatic if done with multiple tuning without a removal of the displacement of the other port. Excrusion, phase, and timing effects will change, where the one with a higher tuning may be designed secondary to the lower tuning one to achieve at least a somewhat usable response down to the low 30s. Essentially, to pull that off effectively (meaning with maintaining acoustic efficiency and output) without losing something of either one tuning idea, you would need to figure for those effects, and I know it can get complicated as far as the calculations go, unless you decide to rely on a program to do it for you, which I do not know of one that can....that I am aware of. That is all the reason why I mentioned what I did. Because depending on what tuning you use, and what volume, placement, etc..all factors of the design, to pull that off with optimized output (not considering what one would consider just "usable" and "good enough"), then that can take some cautious planning and designing to achieve. I have seen many times, others try to make a design with multiple ports, even with those that are removable, with sad results. And even some with usable results, but not one that has had both outputs equal in authority and passband response that was considered optimal. One will have a higher degree of distortion, and one will control the drivers excursion better. ALl I was trying to say, was it can get pretty involved if you want it done right, so know how to do it and you will find yourself with great results. Im not sure how that is offending anyone. Hmmmmm [IMG]//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif[/IMG] [/QUOTE]
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