Unibox/WinISD Port Size Discrepancies - diyAudio
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Old 30th September 2007, 01:31 AM   #1
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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.

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Old 30th September 2007, 02:03 PM   #2
Ron E is offline Ron E  United States
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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.
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Old 30th September 2007, 06:34 PM   #3
Norcad is offline Norcad  Norway
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Look at this:

4" full range at Home Theater Shack
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