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Old 12-18-2007, 10:57 AM
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Ported vs Sealed Box Enclosure

70% of your sound of your sub woofer is due to the design and build quality of your sub enclosure. When picking a sub woofer box, deciding to either go sealed or ported will determine how your system will sound.

Sealed sub woofer boxes tend to be much smaller than ported enclosures, since they use the air inside the box as a spring for the enclosure. If you don't have much space, it would be a good idea to go with a sealed box. Not only is there a size difference, but there's also a difference in sound compared to a ported box. Generally the larger the box gets the lower the tone of bass is achieved. However if the box gets too large the "spring" effect that the air creates may be lost losing on loudness and crispness. Sealed enclosures produce tight, accurate bass and have a flat frequency response curve. They are the enclosure of choice when quality is the ultimate goal of the system set up.

Ported subwoofer boxes can get very large and have many varying factors that will determine their size and bass output. For example the port has to be relative in size to the boxes volume depending on how much loudness vs quality is desired. Ported enclosures create louder bass than sealed enclosures, and allow you to tune the box to a specific frequency to determine how the bass will sound. Higher tuning on a ported box will get louder, but you will ose on sound quality. Lower tuning will still get louder than a sealed box, and at the same time deliver good sound quality. Generally this is a box for a set up where "boom" is the ultimate goal. Port area plays a major role in these types of enclosures. Too little a port area can result in port noise, which can severely detract from the sound quality. However, if your goal is to get loud bass and you don't care too much about the sound quality, a ported box, tuned high, with a large amount of port area is the way to go.
...read the full guide with pics here
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Old 12-18-2007, 11:12 AM
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So, just wanting to extend the dynamic range a little bit, I'd be better off using a sealed box?
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