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Car Audio Discussion
General Car Audio
Acoustic loading and wall explanation
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<blockquote data-quote="adulbrich" data-source="post: 8340360" data-attributes="member: 661255"><p>This is kind of long, so please bare with me..</p><p></p><p>Many trunk cars have the sub and port facing the back of the trunk. Because of acoustic loading, the sound is amplified. One of my friends moved his box to different spots in his trunk and turned it to various angles. What turned out to be the loudest was right up against the trunk lid.</p><p></p><p><strong>Why is it that lots of people in SPL competitions have 12's walled at the trunk?</strong> I know there's a science behind acoustic loading, but what is best?</p><p></p><p>In my car, my only choice is to wall off the front. I also invert my subs to gain every last bit of box volume I can. Is there enough loading off my windshield? Sound waves off the top half of the cone should be hitting it.</p><p></p><p>My port is faced towards the passenger door. When sitting in the passenger seat, it is loudest with the driver side door open, or the driver side window down a little. I know this is common, but can anyone explain it?</p><p></p><p>I'm trying to find out the best sub/port orientation for one or two 12's. I want it to sound the best in the passenger seat, but still allow for foot room.</p><p></p><p>I know this is a lot of questions, but input is appreciated!</p><p></p><p>Pic of my setup:</p><p></p><p><img src="http://i1369.photobucket.com/albums/ag209/adulbrich/IMG_20141219_114606_173_zps00fc3c9f.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="adulbrich, post: 8340360, member: 661255"] This is kind of long, so please bare with me.. Many trunk cars have the sub and port facing the back of the trunk. Because of acoustic loading, the sound is amplified. One of my friends moved his box to different spots in his trunk and turned it to various angles. What turned out to be the loudest was right up against the trunk lid. [B]Why is it that lots of people in SPL competitions have 12's walled at the trunk?[/B] I know there's a science behind acoustic loading, but what is best? In my car, my only choice is to wall off the front. I also invert my subs to gain every last bit of box volume I can. Is there enough loading off my windshield? Sound waves off the top half of the cone should be hitting it. My port is faced towards the passenger door. When sitting in the passenger seat, it is loudest with the driver side door open, or the driver side window down a little. I know this is common, but can anyone explain it? I'm trying to find out the best sub/port orientation for one or two 12's. I want it to sound the best in the passenger seat, but still allow for foot room. I know this is a lot of questions, but input is appreciated! Pic of my setup: [IMG]http://i1369.photobucket.com/albums/ag209/adulbrich/IMG_20141219_114606_173_zps00fc3c9f.jpg[/IMG] [/QUOTE]
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Acoustic loading and wall explanation
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