Topic:Sealed Vs Ported Subwoofer BoxesSo you are ready to start building your car audio system?Where to start? Well a good place to begin is with the subwoofer enclosure.There are many types of enclosures for every vehicle and listening style andeach has its advantages and dis-advantages. As just a general rule of thumb itis important to make sure your subwoofers will match the chosen enclosure so Irecommend knowing what you are planning to run before starting.
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So for instancebefore deciding on a subwoofer box you will want to check what the recommendedairspace specifications are for that model. Now we will discuss a few differentoptions available for enclosures. Click any of the links below to skip to a certain part of the page:- -The most common and versatile type ofenclosure is sealed. This style enclosure is ideal for any application wherespace is going to be an issue. In some cases a sealed recommendation forsubwoofer box will be half of what the ported recommendation is.
They also havethe advantage over ported and band pass enclosures in terms of overall soundclarity. A sealed subwoofer box will deliver a tight, clean and accurate bassresponse and have a flat frequency response curve. In general a sealed box willbe for listeners looking for sound quality driven system that is clean acrossthe entire frequency band.Next up are ported or vented enclosures, “ported” &“vented” are synonymous, it just means the enclosure has a hole in it to let airescape. You know that guy you can hear from 2 blocks away? Well he is likelyrunning ported box. This style enclosure will likely be about twice the size ofa similar sealed box since the airspace inside the chamber is much larger.Ported enclosures are tuned to a certain frequency range which is determined bythe port length, width and diameter. The port can be in several configurationssuch as rounded or a slot which is narrower and taller.
Each subwoofer will havea specific frequency they are designed to run at for maximum output. Dependingon what you plan to use the enclosure for it can be tuned to various frequencyranges by modifying the port.In general most competition SPL vehicles tune to highfrequencies around 45Hz or higher. This setup would be designed for absolutemaximum output but sacrificing a great deal of sound quality. A ported box tuned25Hz will still allow your system to hit the ultra low bass notes while stillkeeping sealed like sound quality.
The disadvantage is the enclosure will thenhave a fairly flat frequency range. And then the most common frequency rangefound usually in pre-built ported / vented enclosures is around 33 – 35Hz.
Atthis frequency the enclosure will still deliver much more bass output than asealed box but at the same type with still retain most of the sound quality. Inother words you will get the best of both worlds with a ported box run at about33Hz.And last but not least are Bandpass enclosures. These are ahybrid box version and combine the features of a sealed and ported sub box intoone enclosure. They are generally the hardest to build and design but offer someunique advantages. Bandpass enclosures are all about efficiency. How they workis a subwoofer or subwoofers in some cases are mounted inside a dual chamberedbox. One chamber is sealed and the other is ported / vented.
The sound wavestravel from the sealed subwoofer chamber though and out the port. This allowsfor a much deeper sounding bass and will be tuned to a narrow frequency bandwhich creates a very aggressive sound. Not all subwoofers will work in bandpassenclosure so make sure you research or check the manual first.Click below to view our selection of.
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