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Low Earth Orbit
DIY Audio
Modular Mid-High
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<blockquote data-quote="Peter Morris" data-source="post: 208614" data-attributes="member: 652"><p>Hi Mark,</p><p></p><p>I modelled your box as a reflex enclosure with a very short horn (3") ... The PM90/60 is horn loaded above about 150Hz and more or less a reflex loaded below that so that it had useful response to 100Hz.</p><p></p><p>If your box is a transmission line with a short horn in front you indeed may get some more efficiency. My best attempt to model this seem to indicate an efficiency just below the PM 90/60.</p><p></p><p>Its been a long since I have heard a TL speaker but I can remember just loving the way they sounded.</p><p></p><p>This video may be of interest [MEDIA=youtube]pPFpSPjTu2k[/MEDIA]</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 208614, member: 652"] Hi Mark, I modelled your box as a reflex enclosure with a very short horn (3") ... The PM90/60 is horn loaded above about 150Hz and more or less a reflex loaded below that so that it had useful response to 100Hz. If your box is a transmission line with a short horn in front you indeed may get some more efficiency. My best attempt to model this seem to indicate an efficiency just below the PM 90/60. Its been a long since I have heard a TL speaker but I can remember just loving the way they sounded. This video may be of interest [MEDIA=youtube]pPFpSPjTu2k[/MEDIA] [/QUOTE]
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