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Low Earth Orbit
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Double 10 and Horn
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<blockquote data-quote="Peter Morris" data-source="post: 212603" data-attributes="member: 652"><p>Hi Kristoffer - with the box standing up the horizontal pattern of the low frequency drivers will be wider than their vertical pattern; from my computer simulation about 45 degrees vertically at 630Hz gradually getting wider as the frequency goes lower.</p><p></p><p>This will match in very well with HF horn which in nominally 90 x 50.</p><p></p><p>Horizontally at 630Hz the HF horn will have lost a bit of its pattern control and will actually be wider than 90 degrees. The pattern at this frequency will be determined mostly by the width of the horn; because the width of the low frequency section is the same as the horn the pattern of the low and high sections will be about the same horizontally at the crossover point, which is exactly what we want.</p><p></p><p>Vertically the HF horn at 630Hz will have also lost its pattern control and instead of being 50 degrees it will be more like 100 degrees … but because all the drivers, the 2 x 10” and the horn are all working together at this frequency the pattern will be a result of how all 3 sum together. If we are lucky it will be reduced back close to 50 degree.</p><p></p><p>If you rotate the horn the low frequency pattern will not match the high frequency. If you just have a single 12” + horn then you can rotate the horn without issue, but with MTM designs it won’t work so well.</p><p></p><p>@ Jaroslav - yes the 18sound designs are great - BTW how is this little system go for you.</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 212603, member: 652"] Hi Kristoffer - with the box standing up the horizontal pattern of the low frequency drivers will be wider than their vertical pattern; from my computer simulation about 45 degrees vertically at 630Hz gradually getting wider as the frequency goes lower. This will match in very well with HF horn which in nominally 90 x 50. Horizontally at 630Hz the HF horn will have lost a bit of its pattern control and will actually be wider than 90 degrees. The pattern at this frequency will be determined mostly by the width of the horn; because the width of the low frequency section is the same as the horn the pattern of the low and high sections will be about the same horizontally at the crossover point, which is exactly what we want. Vertically the HF horn at 630Hz will have also lost its pattern control and instead of being 50 degrees it will be more like 100 degrees … but because all the drivers, the 2 x 10” and the horn are all working together at this frequency the pattern will be a result of how all 3 sum together. If we are lucky it will be reduced back close to 50 degree. If you rotate the horn the low frequency pattern will not match the high frequency. If you just have a single 12” + horn then you can rotate the horn without issue, but with MTM designs it won’t work so well. @ Jaroslav - yes the 18sound designs are great - BTW how is this little system go for you. [/QUOTE]
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