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DIY & Tutorials
DIY For Audio
A subwoofer for a horn system
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<blockquote data-quote="u235" data-source="post: 1068773" data-attributes="member: 1485"><p>Thanks for the info. Having read a bit more this evening, prompted by the link, I see polysterene diaphragms have quite poor bass response, not sure if its their flatness or their stiffness to blame.</p><p></p><p>I believe phase is more important in the lower frequencies - it seems to be generally ignored (as long as the drivers are wired right) above about 100z.</p><p></p><p>Thing is, if two waves are out of phase they will produce odd reinforcements and cancellations. If you look at graph no. 3, it is only in phase at 30hz. At 70hz it is inverted 180 degrees. This means that at 70hz the wave from the horn and the wave from the sub will cancel each other out.</p><p></p><p>This is not good.</p></blockquote><p></p>
[QUOTE="u235, post: 1068773, member: 1485"] Thanks for the info. Having read a bit more this evening, prompted by the link, I see polysterene diaphragms have quite poor bass response, not sure if its their flatness or their stiffness to blame. I believe phase is more important in the lower frequencies - it seems to be generally ignored (as long as the drivers are wired right) above about 100z. Thing is, if two waves are out of phase they will produce odd reinforcements and cancellations. If you look at graph no. 3, it is only in phase at 30hz. At 70hz it is inverted 180 degrees. This means that at 70hz the wave from the horn and the wave from the sub will cancel each other out. This is not good. [/QUOTE]
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DIY & Tutorials
DIY For Audio
A subwoofer for a horn system
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