DIY Audio Projects Forum

The Wonder Of Unibox
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Author:  the.sabs [ 07 Sep 2008, 17:13 ]
Post subject:  The Wonder Of Unibox

Unibox, where to begin?

Ok as recommended by billnchristy (PROPS) i have got unibox, i cant use winISD, as i am a mac fiend.

I am getting a bit lost, i find it ok to plug in the figures, and, well thats about it.

any pointers much appreciated.


Author:  RiGuy [ 07 Sep 2008, 18:22 ]
Post subject:  Re: The Wonder Of Unibox

I cant help him on this if someone could chime in that would be much appreciated.

Author:  Gio [ 07 Sep 2008, 18:41 ]
Post subject:  Re: The Wonder Of Unibox

Start with ISD online:

Use the same units for Vas and Vb

Author:  the.sabs [ 08 Sep 2008, 05:07 ]
Post subject:  Re: The Wonder Of Unibox

Cheers G,

I think in the DIY speakers post you put the same info, i now have winISD (at work!!) sooo much easier for what i want.

Thanks again

Author:  Gio [ 08 Sep 2008, 08:13 ]
Post subject:  Re: The Wonder Of Unibox

Hi Sabs,

ISD Online is web based, so it will work on any operating system.

Author:  billnchristy [ 08 Sep 2008, 11:39 ]
Post subject:  Re: The Wonder Of Unibox

Sorry you didn't find unibox to your liking.

I always start with 2 things and then work from there:

1) The size of the enclosure you want to use, just have a rough idea...if you are looking for 7l try 5-12 or something like that. Always make sure you hit the graph button for each change so you can see the differences.

2) For a sealed box I try to get the QTC somewhere between .8 and 1.0 you can go lower and a little higher but that is a good midpoint that will provide you with some good bass.

For a ported box you need to decide where you want your tuning frequency, for music I like 33hz, for HT you could shoot for 10-20hz. If you are lucky enough to be able to get the response you want in the enclosure you want then you are done as long as the port will fit!!

I always like to look at the graphs on the seperate tabs as well, I prefer not to allow a woofer to exceed its max excursion at any point because I feel this is the right way to design. Sometimes it does not work out and as long as it is not crazy I will let it slide.

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