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Low Earth Orbit
DIY Audio
Double 10 and Horn
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<blockquote data-quote="Peter Morris" data-source="post: 211330" data-attributes="member: 652"><p>I think the 10mw650 is a better choice. As you noted it has a better Xmax and behaves very well up to the crossover frequency of 650Hz, FWIW I used the 8mw650's in my line-array. The RCF ND950 will work fine down to about 650 - 700Hz on that horn but the VHF will not be as nice as the BMS.</p><p></p><p>The trick with my double 10" (and the JTR) is crossing over low enough so the 10 inch drivers combine together nicely. They are spaced at 1/2 a wave length (650Hz); while it would be better if it was a 1/4 of a wave length, in practical terms things start to play nicely with each other if the spacing is less than a 1/2 a wave length. It also places the HF horn at more or less the same spacing, so it combines with the 10's without major off axis (vertical) issues.</p><p></p><p>That crossover frequency also mean that the horizontal patterns between the horn and 10 inch driver also match quite well at the crossover point.</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 211330, member: 652"] I think the 10mw650 is a better choice. As you noted it has a better Xmax and behaves very well up to the crossover frequency of 650Hz, FWIW I used the 8mw650's in my line-array. The RCF ND950 will work fine down to about 650 - 700Hz on that horn but the VHF will not be as nice as the BMS. The trick with my double 10" (and the JTR) is crossing over low enough so the 10 inch drivers combine together nicely. They are spaced at 1/2 a wave length (650Hz); while it would be better if it was a 1/4 of a wave length, in practical terms things start to play nicely with each other if the spacing is less than a 1/2 a wave length. It also places the HF horn at more or less the same spacing, so it combines with the 10's without major off axis (vertical) issues. That crossover frequency also mean that the horizontal patterns between the horn and 10 inch driver also match quite well at the crossover point. [/QUOTE]
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