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<blockquote data-quote="tinmanchris217" data-source="post: 6331791" data-attributes="member: 610505"><p>I know this thread doesn't get much action, but ...</p><p></p><p>I was reading in the early pages that car peaks usually happen 4-10 Hz above your box freqs. If my cabin gain peaks at 53 Hz, I should make a few ports that span the range 43 Hz --&gt; 49 Hz.</p><p></p><p>Is this a good plan, regardless of box volume? I was under the impression that tuning frequency for your peak changed with box IV.</p><p></p><p>Side Note:</p><p></p><p>Good rule of thumb mentioned was "port area" = Sd ... This makes more sense for SPL work, since we can use monster or tiny boxes, and tend to change them on the fly.</p><p></p><p>ex: 2 10's, it'll be ~100 sq in. much easier than 16 sq/cf.</p></blockquote><p></p>
[QUOTE="tinmanchris217, post: 6331791, member: 610505"] I know this thread doesn't get much action, but ... I was reading in the early pages that car peaks usually happen 4-10 Hz above your box freqs. If my cabin gain peaks at 53 Hz, I should make a few ports that span the range 43 Hz --> 49 Hz. Is this a good plan, regardless of box volume? I was under the impression that tuning frequency for your peak changed with box IV. Side Note: Good rule of thumb mentioned was "port area" = Sd ... This makes more sense for SPL work, since we can use monster or tiny boxes, and tend to change them on the fly. ex: 2 10's, it'll be ~100 sq in. much easier than 16 sq/cf. [/QUOTE]
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