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Enclosure Design & Construction
Should I add a port to my small sealed sub woofer box?
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<blockquote data-quote="Jeffdachef" data-source="post: 8697391" data-attributes="member: 650438"><p>where the box is at and how the sub is firing means everything on output. If you are getting zero output in this car and a lot of output in another car, its 3 things.</p><p></p><p>Your box positioning and orientation is horrible causing phase cancellation which literally results in negative bass. It needs to face away from you and bounce towards a solid wall around 4 inches away from the wall. No reflective wall means no reflective wave that builds into proper sound and sound pressure. Your vehicle acoustics may be different from the other car as well.</p><p></p><p>Other is the head unit since its a boss, might have a fake RCA output rating which means no matter how you set your gains, you never will get full power out of your amp. You need a true 4 volt sub pre-out, it makes that big of a difference.</p><p></p><p>Then your sealed box is way too small, space makes bass. Of course the other two are way more important than this factor because even with an inferior box, you should still get some bass. From what you say, it sounds like you have negative amounts of bass which is definitely either signal or phase cancellation.</p></blockquote><p></p>
[QUOTE="Jeffdachef, post: 8697391, member: 650438"] where the box is at and how the sub is firing means everything on output. If you are getting zero output in this car and a lot of output in another car, its 3 things. Your box positioning and orientation is horrible causing phase cancellation which literally results in negative bass. It needs to face away from you and bounce towards a solid wall around 4 inches away from the wall. No reflective wall means no reflective wave that builds into proper sound and sound pressure. Your vehicle acoustics may be different from the other car as well. Other is the head unit since its a boss, might have a fake RCA output rating which means no matter how you set your gains, you never will get full power out of your amp. You need a true 4 volt sub pre-out, it makes that big of a difference. Then your sealed box is way too small, space makes bass. Of course the other two are way more important than this factor because even with an inferior box, you should still get some bass. From what you say, it sounds like you have negative amounts of bass which is definitely either signal or phase cancellation. [/QUOTE]
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Should I add a port to my small sealed sub woofer box?
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