How to correctly use WinISD

[GM]

Everything you need to know is in the HELP file, but this tutorial lays it out a bit better: WinISD Pro Tutorial and Download (A detailed guide on how to use WinISD Pro) - Home Theater Forum and Systems - HomeTheaterShack.com

The program can reconcile even major discrepancies I've encountered with some manufacturer's published 'wishful dreams'. Actually, this driver only has a few off by fractions compared to its math derived 'ideal', i.e. it was accurately measured.

GM

[digits]

Hey man I'm subed, thanks for starting the thread.

[loninappleton]

Originally Posted by digits

Hey man I'm subed, thanks for starting the thread.

YouTube - WinISD-entering-parameters.avi

Here is a link to a you tube about entering the data. The sidebar shows some other box design vids. using other programs.

I will give it another whirl. But I may be just having a three into two won't go problem. The old Roland belongs in an OB. I've been told that repeatedly and I think that finally I will give that a shot. Once done I can re-cut the OB for a Karlson. My move to Karlson is to get the box size down from floor standers. Plus the K's look interesting. I have one made but not tuned.

[digits]

So, once you know the optimal volume of the unit (sealed box), how do you determine the optimal dimensions?

[Arty]

optimal dimensions are where standing waves occur at different freqvencys.
Suposedly one can just use 3rd root of 2 as the ratio of sides.
if A dimension is 1, then B should be 1,26 , C should be 1,59 or so.
But actualy for subs the ratios do not mather that mutch, standing waves will be formed at out of band freqvency for the sub.

[digits]

My woofer can go from 30 something to 3000Hz, I want to let it handle 30 to 2000 untill I get midrange drivers.... would the dimensions become more critical?

[GM]

Originally Posted by loninappleton

The old Roland belongs in an OB.

Once done I can re-cut the OB for a Karlson.

Well, the smallest cab would be an OB, but I prefer the extra control of some form of TL for high Qt drivers. Which version of Karlson will such a high Q driver work in?

GM

[GM]

Originally Posted by digits

.......would the dimensions become more critical?

Correct, think of the cab as a very small room with all the same modes as a large one, just beginning higher in frequency.

GM

[Zero D]

Nice to see people making use of the thread

I wish i'd called it "WinISD without tears" or something similar, instead of "How to correctly use WinISD"

I realise there are more ways than mine to successfully use WinISD, but so many people seem to have, or have had problems entering the parameters correctly, and therefore making errors & getting frustrated etc, i felt that by making this thread with lots of clear screeshots etc, would enable them to spend more time designing, and more quickly, with a sure fire way that works and gets results