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Enclosure Design & Construction
cancellation? trunk acting as bandpass?
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<blockquote data-quote="T3mpest" data-source="post: 8161149" data-attributes="member: 560148"><p>One thing to realize is that the trunk doesn't have walls thick enough to act as a true bandpass at any bass frequency. It can absorb higher upper frequencies, 100hz an higher, using the rear seats to absorb along with small holes out of the trunk, but that's the extent of the bandpass effect. If your louder with the trunk open it is a cancellation issue. Changing the subwoofer orientation will fix it. Try firing the sub directly into the trunk lid, I would pay good money that says that you won't be louder with the trunk open then. Although you will have some rattles. Other option is to keep facing the woofer into the car, but fully seal it off so that the wave can't travel behind the box to make it to the trunk lid.</p></blockquote><p></p>
[QUOTE="T3mpest, post: 8161149, member: 560148"] One thing to realize is that the trunk doesn't have walls thick enough to act as a true bandpass at any bass frequency. It can absorb higher upper frequencies, 100hz an higher, using the rear seats to absorb along with small holes out of the trunk, but that's the extent of the bandpass effect. If your louder with the trunk open it is a cancellation issue. Changing the subwoofer orientation will fix it. Try firing the sub directly into the trunk lid, I would pay good money that says that you won't be louder with the trunk open then. Although you will have some rattles. Other option is to keep facing the woofer into the car, but fully seal it off so that the wave can't travel behind the box to make it to the trunk lid. [/QUOTE]
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cancellation? trunk acting as bandpass?
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