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08-13-2006, 01:41 PM
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#1
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Low Bitrate
Join Date: Sep 2005
Location: UK
Posts: 110
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Sub Enclosure Slot port
Hi,
I have a JL 10 W7. The recommended ported enclosure for this is a slot. Does anyone know anything about this and ported enclosures in general, how do you know the size of the port and where to put it?
Thanks
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08-13-2006, 03:23 PM
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#2
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FLAC
Join Date: Jul 2001
Posts: 1,109
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The port area should be listed. Rectangular area is calculated by width x height. You can put the port anywhere on the box but people usually put them on the baffle face.
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08-14-2006, 02:17 PM
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#3
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Constant Bitrate
Join Date: Feb 2006
Location: Massachusetts
Posts: 144
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If you visit JL Audio's website they will give you the exact dimensions for creating a slot port enclosure.
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08-14-2006, 02:36 PM
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#4
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_
Join Date: Mar 2004
Location: Little Elm, Texas
Posts: 13,405
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just backing up what the others have said!
do you have a length for the port as well?
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08-14-2006, 03:06 PM
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#5
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Low Bitrate
Join Date: Sep 2005
Location: UK
Posts: 110
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thanks for the response guys. I realise that jl have the dimensions for a slot port but I was trying to get an understanding as I am wanting to create a customer fit box. So is it the port length that is important or the port area (ie the size of the hole?)
Thanks
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08-14-2006, 03:08 PM
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#6
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_
Join Date: Mar 2004
Location: Little Elm, Texas
Posts: 13,405
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all of it.
I understand wanting to keep it all custom.
You really need to keep the port as they have recommended.
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08-14-2006, 03:45 PM
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#7
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Low Bitrate
Join Date: Sep 2005
Location: UK
Posts: 110
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OK so if the port area and the port length are both key, what is stopping me from making the port sqaure as apossed to a slot?
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08-14-2006, 04:28 PM
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#8
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_
Join Date: Mar 2004
Location: Little Elm, Texas
Posts: 13,405
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I don't think there's a difference in going with a rectangular port v. a square port.
Make sure the face of the port is tapered to cut down on port noise.
From my understanding, a circular port will cut down on noise the most.
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08-14-2006, 08:52 PM
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#9
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FLAC
Join Date: Jul 2001
Posts: 1,109
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You're supposed to not bypass a 3:4 ratio of the length of the sides. Try not to make the lenghs multiples of eachother and you'll be okay.
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08-15-2006, 12:04 PM
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#10
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Maximum Bitrate
Join Date: Aug 2005
Location: Anaheim Hills, Ca
Posts: 847
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Here is a one-stop all you need to know on building box's forum:
http://www.caraudio.com/forum/forumdisplay.php?f=25
Good luck....
__________________
PostCount++
- SrCsTc's Bezel
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09-24-2006, 12:12 PM
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#11
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Low Bitrate
Join Date: Sep 2005
Location: UK
Posts: 110
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Another quick question a can't find a definitive answer to. In terms of port length. Is it just the length that is key? Can a port have an 180degree bend in it.
Thanks
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09-24-2006, 05:13 PM
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#12
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_
Join Date: Mar 2004
Location: Little Elm, Texas
Posts: 13,405
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yes, a bend is ok, just keep the same dimensions
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09-24-2006, 05:55 PM
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#13
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FLAC
Join Date: Jul 2001
Posts: 1,109
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Just remember if you angle the port to measure the length down the midline of the vent.
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