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
port length and construction
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="evo2k3" data-source="post: 129134" data-attributes="member: 546246"><p>attached is a diagram of my box (all dem are inside), alreadt built. the sub is inverted and the cone inside comsumes 0.02ft^3 from the total 1.9567 ft^3 leaving 1.9367 ft^3 before port displacment. the sub will be running 600 watts, and have 3 --3" ports, i belive keeping the port air vel below 30 m/s.....now i pulled the equation from jl's website for port length but cannot seem to get a reasonable length from it (i get something around 5000 inches!) so here are my questions:</p><p></p><p>1) what is the defining equation for port length? please calulate what my port length should be tuned for 32 hz so i can confirm it when i calulate it with the new equations.</p><p></p><p>2) i belive the ports are going to be rather long (20+ inches)....so i would like to use 3" pvc, twp questions with this:</p><p></p><p>--will they rattle inside the box? if so what is a good aproach to prevent this?</p><p></p><p>-- how do i finish the port at the surface (where you normal see the flared tube)?</p><p></p><p>any other tips for porting this box will be helpfull, im ported it tommorow or the next day.</p></blockquote><p></p>
[QUOTE="evo2k3, post: 129134, member: 546246"] attached is a diagram of my box (all dem are inside), alreadt built. the sub is inverted and the cone inside comsumes 0.02ft^3 from the total 1.9567 ft^3 leaving 1.9367 ft^3 before port displacment. the sub will be running 600 watts, and have 3 --3" ports, i belive keeping the port air vel below 30 m/s.....now i pulled the equation from jl's website for port length but cannot seem to get a reasonable length from it (i get something around 5000 inches!) so here are my questions: 1) what is the defining equation for port length? please calulate what my port length should be tuned for 32 hz so i can confirm it when i calulate it with the new equations. 2) i belive the ports are going to be rather long (20+ inches)....so i would like to use 3" pvc, twp questions with this: --will they rattle inside the box? if so what is a good aproach to prevent this? -- how do i finish the port at the surface (where you normal see the flared tube)? any other tips for porting this box will be helpfull, im ported it tommorow or the next day. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Help
Enclosure Design & Construction
port length and construction
Top
Menu
Home
Refresh