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DIY Audio
Thoughts/ideas on a 21" ported horn sub
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<blockquote data-quote="Art Welter" data-source="post: 212416" data-attributes="member: 52"><p>Kev,</p><p></p><p>I'd prefer an offset horn driver arrangement rather than the small slot you chose for more even cone loading.</p><p>If you do use a slot, make sure it can accept the driver's 30mm one-way Xlim/Xmech excursion without the surround striking it.</p><p>I'd also like to see any valid measurements showing rectangular ports "add distortion and port compression over an equivalent round port".</p><p></p><p>What drivers, excursion levels and voltage are you comparing in post #1?</p><p>Reducing port volume (from 42,300 to 11,060) by 74% seems extremely small for a driver with the displacement of the B&C 21DS115.</p><p>How does the port velocity compare between the two at 15mm excursion?</p><p></p><p>Art</p></blockquote><p></p>
[QUOTE="Art Welter, post: 212416, member: 52"] Kev, I'd prefer an offset horn driver arrangement rather than the small slot you chose for more even cone loading. If you do use a slot, make sure it can accept the driver's 30mm one-way Xlim/Xmech excursion without the surround striking it. I'd also like to see any valid measurements showing rectangular ports "add distortion and port compression over an equivalent round port". What drivers, excursion levels and voltage are you comparing in post #1? Reducing port volume (from 42,300 to 11,060) by 74% seems extremely small for a driver with the displacement of the B&C 21DS115. How does the port velocity compare between the two at 15mm excursion? Art [/QUOTE]
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Thoughts/ideas on a 21" ported horn sub
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