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Low Earth Orbit
DIY Audio
PMA - 60; New arrayable double 12 and horn.
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<blockquote data-quote="Peter Morris" data-source="post: 214891" data-attributes="member: 652"><p>It was about 43 - 44 L allowing for the, horn and diver volumes - I did not calculate an equivalent square port area, but he box needs to be tuned to 65 - 75 Hz depending on the driver. </p><p></p><p>Doing the ports the way I did braced the box walls, in addition the port exit is a bit small but doing it this way minimized port noise. The port tuning frequency is also below the crossover point to the subs; and the port resonant frequency above the crossover frequency to the horn</p><p>.</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 214891, member: 652"] It was about 43 - 44 L allowing for the, horn and diver volumes - I did not calculate an equivalent square port area, but he box needs to be tuned to 65 - 75 Hz depending on the driver. Doing the ports the way I did braced the box walls, in addition the port exit is a bit small but doing it this way minimized port noise. The port tuning frequency is also below the crossover point to the subs; and the port resonant frequency above the crossover frequency to the horn . [/QUOTE]
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PMA - 60; New arrayable double 12 and horn.
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