Log in
Register
Home
Forums
New posts
Search forums
What's new
New posts
New profile posts
Latest activity
News
Members
Current visitors
New profile posts
Search profile posts
Features
Log in
Register
Search
Search titles only
By:
Search titles only
By:
New posts
Search forums
Menu
Install the app
Install
Reply to thread
Home
Forums
Low Earth Orbit
DIY Audio
Custom box advice
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="Kevin McDonough" data-source="post: 209273" data-attributes="member: 10402"><p>hey</p><p></p><p>yeah as said, the two common issues is that firstly the volume you get from the software is the net volume of actual air that needs to be in the cab. The volume of air inside the ports isn't counted in this, so the cab has to be larger by this amount to make it work, and everything else inside the cabinet that takes up space also needs to be acconted for (braces, handles, and if you really want to be accurate even small things like pole mounts etc). Depending on what sim software you're using, it may already account for he volume taken up by the driver itself, and if you enter the port dimensions you plan to use (for calculating air velocity in the ports) it may also take these into account. But you need to check what the software says and make sure everything is accounted for to give you your final gross volume for the cab.</p><p></p><p>Secondly the positioning of the ports can be important. if you use shelf or corner ports that use the sidewalls of the cab as one wall of the port then the fact that the sidewall continues on past the end of the port adds a little bit of virtual extension onto the length of the port, it'll tune slightly differently than the length on it's own may suggest. Similarly if the end of the port is close to a boundary or brace (for example if you use big, long ports that almost reach to the back of the cab) that can also affect the air travelling in and out of the entrance to the port and change things slightly.</p></blockquote><p></p>
[QUOTE="Kevin McDonough, post: 209273, member: 10402"] hey yeah as said, the two common issues is that firstly the volume you get from the software is the net volume of actual air that needs to be in the cab. The volume of air inside the ports isn't counted in this, so the cab has to be larger by this amount to make it work, and everything else inside the cabinet that takes up space also needs to be acconted for (braces, handles, and if you really want to be accurate even small things like pole mounts etc). Depending on what sim software you're using, it may already account for he volume taken up by the driver itself, and if you enter the port dimensions you plan to use (for calculating air velocity in the ports) it may also take these into account. But you need to check what the software says and make sure everything is accounted for to give you your final gross volume for the cab. Secondly the positioning of the ports can be important. if you use shelf or corner ports that use the sidewalls of the cab as one wall of the port then the fact that the sidewall continues on past the end of the port adds a little bit of virtual extension onto the length of the port, it'll tune slightly differently than the length on it's own may suggest. Similarly if the end of the port is close to a boundary or brace (for example if you use big, long ports that almost reach to the back of the cab) that can also affect the air travelling in and out of the entrance to the port and change things slightly. [/QUOTE]
Insert quotes…
Verification
Post reply
Home
Forums
Low Earth Orbit
DIY Audio
Custom box advice
Top
Bottom
Sign-up
or
log in
to join the discussion today!