Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

Unibox/WinISD Port Size Discrepancies
Unibox/WinISD Port Size Discrepancies
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 30th September 2007, 01:31 AM   #1
HTRookie is offline HTRookie  Canada
diyAudio Member
HTRookie's Avatar
Join Date: Jan 2004
Location: Left Coast
Default Unibox/WinISD Port Size Discrepancies


I have 4 Tang Band W4-656SB's that I intend to use for modest surround speakers (1 per enclosure). Modelling in Unibox gives me the following:

Std Design: 3.4 litres with a port of 4.27 cm dia & 94.14 cm length

Design by Vb, Fb & Q: 5.0 litres with a port of 4.04 cm dia & 41.71cm length

Modelling in WinISD gives me 3.0 litres, with a port of 3.81 cm dia & 14.78cm in length...

What box volume/port dimensions should I build to, given these discrepancies??

Thanks for any help.

  Reply With Quote
Old 30th September 2007, 02:03 PM   #2
Ron E is offline Ron E  United States
diyAudio Member
Ron E's Avatar
Join Date: Jun 2002
Location: USA, MN
The first two are way off. I have no idea what you are plugging into that program, but I cannot duplicate your results.

The last one will work, but is perhaps too small and tuned too high, IMO. Make the box 4L and the port 1.5" Dia x ~21cm long (or use a PR) and you should be OK.
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan
Armaments, universal debt, and planned obsolescence--those are the three pillars of Western prosperity. Aldous Huxley
  Reply With Quote
Old 30th September 2007, 06:34 PM   #3
Norcad is offline Norcad  Norway
diyAudio Member
Join Date: Jun 2006
Look at this:

4" full range at Home Theater Shack
  Reply With Quote


Unibox/WinISD Port Size DiscrepanciesHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
issue WinISD port length Qes/Pe! Amit_112dB Subwoofers 4 4th August 2007 06:26 AM
Port length in WinISD? Marsh Subwoofers 10 1st July 2007 07:42 PM
WinISD vs. UniBox on port tuning dscline Subwoofers 3 27th September 2006 05:39 PM
Winisd port configuration toenail Subwoofers 3 30th January 2006 01:23 AM
newbie question.WinISD and port tubes PTM Multi-Way 4 31st January 2005 08:55 AM

New To Site? Need Help?

All times are GMT. The time now is 03:03 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio