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ported box for jl audio 13w7 opinions


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DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: November 29, 2007 at 5:11 PM / IP Logged  
stevdart 
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Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member consistently provides reliable informationspace
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Location: Pennsylvania, United States
Posted: November 29, 2007 at 6:39 PM / IP Logged  

A lot of people who spend some time experimenting with placement find that when the driver side is facing at an upward angle toward the rear, they get best results.  That is as opposed to firing straight forward or straight up.  Here is an example of a box design that would give you the leeway to use it as either straight forward firing or tilted at an upward angle:

ported box for jl audio 13w7 opinions - Page 2 - Last Post -- posted image.

ported box for jl audio 13w7 opinions - Page 2 - Last Post -- posted image.

Driver and port opening should be on the same front baffle.  This example shows how you can use your imagination to more easily experiment with firing direction in the vehicle.

There are some SPL builders who have experimented exhaustively on placement, including separation of driver and port firing directions.  These experiments were done for a single vehicle to find highest SPL, and I have heard of at least one setup that fires port upward while the driver fires forward.  The key is that this configuration was specific for that particular car and box build, and nothing but SPL was the intended result.  Sound quality was not a consideration.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
steveskal 
Copper - Posts: 56
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Joined: June 01, 2007
Location: United States
Posted: November 29, 2007 at 10:55 PM / IP Logged  
Thats very interesting, maybe I can just put a chock under the front of the box and voila, its diagonal pointing up. I don't know if that is oppotune but I could at least experiment with that.
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