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Rivalry
Dodge Dakota
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3/19/2005
06:29:03
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 Subject: "Airhole" for subs?
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I came across an acquaintance today and they took a look at my truck, inside and out. When they got to the subs (two 10" Premier subs) they asked why there wasn't an airhole in the side - I looked at them like they were crazy. Supposedly it's a way to release pressure and let the sound flow better, but it just doesn't seem right to me.
Are there supposed to be holes in the side/back/front of the box or not? I am 100% confused now. Thanks in advance.
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SQDak
Dodge Dakota
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3/19/2005
10:16:02
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they're called ports or vents.....google it, tons of stuff on the 'net about it....just another type of sub enclosure.
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Rivalry
Dodge Dakota
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3/19/2005
17:11:18
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When it comes to performance, do they make a difference? Also, would there be a difference between the enclosures that come with ports already and one I ghetto-rig up with my own hole on the side?
Thanks for the response, I figured I had the wrong word for it.
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Alan
Dodge Dakota
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3/19/2005
17:58:29
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No, there are diferent types of boxes for diferent reasons.
The box should also be the right size for the sub(s) in it. There's a certain volume of air that should be in the box, depending on the sub, and the type of box.
The 2 most common boxes (IMO) are sealed and ported. with the same sub, the ported box has to be larger than the sealed one, and the port is actually a tube that is cut to a certain length depending on what frequency you want to make louder.
For example my Infinity Kappa Perfect 10.1 subs require .60 cubic feet for a sealed box (which has to be air tight), and 1.00 cubic feet for a ported box.
People make their ports for anywhere from 25htz to 50htz (usually from what I've seen they're set at 25-35).
No type of box is "better" than the other. They all have their benefits and draw backs. There's a lot of info on this at www.clubknowledge.comCar_Audio_FAQ/forum/
or
www.bcae1.com
(bcae1 is a lot more technical and has everything in detail about car audio. Both are free sites).
If you get a membership at clubknowledge you can post questions there and you'll get some great advice from experts (just need an email address).
DON'T just put a hole in the box without a port and without a filter that filters out the signals below the frequency that the port is set to, plus the box would have to be bigger to go ported (unless it's not the right size as a sealed box).
Sealed boxes are more accurate at playing a wide range of bass notes (20htz-100htz ish), ported will get generally about 3DB louder (give or take) but that's only around the frequency that it's made for.
There are other boxes out there too that have their benefits, but require even bigger boxes, just a matter of preferance.
Hope that helped.
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Rivalry
Dodge Dakota
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3/20/2005
02:21:30
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And here I was all ready to just drill me a hole, lol. Thanks man, much appreciated - learn new stuff everyday.
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Remav
Dodge Dakota
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4/23/2005
00:32:47
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Free Software that may help you is here:
http://www.ajdesigner.com/speaker/index.php
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rt2party
Dodge Dakota
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4/26/2005
11:04:22
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a sealed box is a happy box. if it sounds fine now, just leave it alone!
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jay
Dodge Dakota
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4/26/2005
14:06:46
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sealed boxs are better for spl.you always have a sealed box for sterio comps.your subs will hit harder with a sealed box than with a ported. as far as i am concered ported boxes suck. thats why you buy them at walmart.
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