the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

winisd tunning


Post ReplyPost New Topic
< Prev Topic Next Topic >
brettfields 
Member - Posts: 16
Member spacespace
Joined: September 12, 2005
Location: United States
Posted: March 15, 2007 at 12:03 PM / IP Logged  
had a quick question, why are the port lengths different from the man specs and what winisd spits out, for the same box size and same tunning the port lengths are almost 10 in off. what am i doing wrong
aznboi3644 
Gold - Posts: 2,600
Gold spaceThis member consistently provides reliable informationspace
Joined: May 01, 2006
Location: United States
Posted: March 15, 2007 at 3:44 PM / IP Logged  
port length depends on port area, tuning, and net internal volume
Depends on what kind of response you chose on WinISD
stevdart 
Platinum - Posts: 5,816
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
Joined: January 24, 2004
Location: Pennsylvania, United States
Posted: March 15, 2007 at 4:58 PM / IP Logged  

brettfields wrote:
had a quick question, why are the port lengths different from the man specs and what winisd spits out, for the same box size and same tunning the port lengths are almost 10 in off. what am i doing wrong

For the two criteria you listed - box size and tuning freq - the comparison you didn't mention is port diameter.  A larger port opening area (diameter) will equate with a longer length.  Have you successfully worked up a vented enclosure using WinISD before this?  And have you gone through my thread above ( Guide to WinISD) on using this program?  There is no way to tell, at this point with the limited info you provided, whether you are doing something wrong or not.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
brettfields 
Member - Posts: 16
Member spacespace
Joined: September 12, 2005
Location: United States
Posted: March 15, 2007 at 11:09 PM / IP Logged  
yea i understand how to use it, it just that if i put in kickers specks the port length is different than what they give for the tuning. was wondering why
aznboi3644 
Gold - Posts: 2,600
Gold spaceThis member consistently provides reliable informationspace
Joined: May 01, 2006
Location: United States
Posted: March 16, 2007 at 3:40 PM / IP Logged  
check port DIAMETER???
brettfields 
Member - Posts: 16
Member spacespace
Joined: September 12, 2005
Location: United States
Posted: March 16, 2007 at 9:41 PM / IP Logged  
aznboi3644 wrote:
check port DIAMETER???
same specs all around
DYohn 
Moderator - Posts: 10,741
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: March 17, 2007 at 9:52 AM / IP Logged  

Different enclosure modeling methods often produce different results.  Every software programmer tends to give slightly different weights to different parameters.  So WinIsd is a little different from Bass Box Pro or Speaker Workshop or LEAP or on-line calculators or whatever.  Also, manufacturer's recommendations are generally aimed at what they think the "average user" will find appealing, not necessarily at what is optimal for the speaker.  Your results are not surprising.

My advice is if you know how to use WinIsd to generate a particular modelled response, use it.  If you don't care about that and you simply want good average output, use the MFG specs.

Support the12volt.com

Sorry, you can NOT post a reply.
This topic is closed.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Saturday, October 5, 2024 • Copyright © 1999-2024 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer