Menu
Forum
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Car Audio Discussion
General Car Audio
Car Audio Build Logs
Car Audio Equipment
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Help
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Car Audio Classifieds
Car Audio Wanted
Classifieds Member Feedback
Gallery
New media
New comments
Search media
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Log in / Join
Test
Forum
Search
Search titles only
Search titles only
Log in / Join
Search
Search titles only
Search titles only
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Menu
Reply to thread
Forum
Car Audio Help
Enclosure Design & Construction
Question on How to Measure Port length-2 diff. designs
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="PowerNaudio" data-source="post: 2729812" data-attributes="member: 561215"><p>let me see if i can put this into words since i guess the drawing is a bit hard to figure out. lol</p><p></p><p>that straight port although straight is measure just like a T port but with out the port length on each side of the port.</p><p></p><p>ok the port starts at the out side opening of the port on the front baffle and ends on the inside end of the port inside the enclosure.</p><p></p><p>now since the port opening inside the enclosure is 3" away from the rear wall and facing the wall, the openings around the port turn into part of the port. and have to be accounted as port area.</p><p></p><p>so the port doesn't end on the physical end of the port but on the side of the port.</p><p></p><p>the red line in the drawing shows the distance from the wall to the port opening.</p><p></p><p>now you have to find the center point of that space. which is 1.5" from the wall and 2.25" from the outside edges of the port side wall. you have to account the port wall .75" as part of the the port length during a bend like that.</p><p></p><p>so you add the physical length of the port then from the end of the port to the 1.5" center of the space between the port and the rear wall. then a 2.25" from that center point to the side of of the port. including the ports mdf .75 wall. i had broken down that 2.5" in to two different values so you would get a better idea of where those numbers where coming from which where the port mdf wall and the 1.5" from the center of the port to the inside edge of the port.</p><p></p><p>if you look at the drawing that i modified of your drawing youll see the what the vales are measuring.</p><p></p><p>let me know if that explains it.</p><p></p><p><a href="http://www.putfile.com/pic.php?img=4927064" target="_blank"><img src="http://img1.putfile.com/thumb/3/6510313969.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p></blockquote><p></p>
[QUOTE="PowerNaudio, post: 2729812, member: 561215"] let me see if i can put this into words since i guess the drawing is a bit hard to figure out. lol that straight port although straight is measure just like a T port but with out the port length on each side of the port. ok the port starts at the out side opening of the port on the front baffle and ends on the inside end of the port inside the enclosure. now since the port opening inside the enclosure is 3" away from the rear wall and facing the wall, the openings around the port turn into part of the port. and have to be accounted as port area. so the port doesn't end on the physical end of the port but on the side of the port. the red line in the drawing shows the distance from the wall to the port opening. now you have to find the center point of that space. which is 1.5" from the wall and 2.25" from the outside edges of the port side wall. you have to account the port wall .75" as part of the the port length during a bend like that. so you add the physical length of the port then from the end of the port to the 1.5" center of the space between the port and the rear wall. then a 2.25" from that center point to the side of of the port. including the ports mdf .75 wall. i had broken down that 2.5" in to two different values so you would get a better idea of where those numbers where coming from which where the port mdf wall and the 1.5" from the center of the port to the inside edge of the port. if you look at the drawing that i modified of your drawing youll see the what the vales are measuring. let me know if that explains it. [URL="http://www.putfile.com/pic.php?img=4927064"][IMG]http://img1.putfile.com/thumb/3/6510313969.jpg[/IMG][/URL] [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Help
Enclosure Design & Construction
Question on How to Measure Port length-2 diff. designs
Top
Menu
Home
Refresh