Designing box questions

[jmgb4 10+ year member]

Hey guys. I have always used the RE Box Tuning Calculatorto design my boxes (or get the just of it) and also used it to figure out the tuning frequency. How do you guys find the tuning in a box without it?

I am also trying to figure out how to use WinISD to find impedance and other useful information - is anybody good with that program? I know its not 100% but it does help...

What other tricks do you guys use to see if a box is "junk" or not? I would just like to have this box I am building next weekend be the best I can do at this point and not have to rebuild it soon...

I do know that its 12-16 inches per cubic foot for an L port and 9-13 for an aero port. I am mainly concerned about double checking the RE calculator to see if thats any good by using other sources. I just heard the RE calculator is off and I have no way to double check..

Thanks

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[RAM_Designs 5,000+ posts]

I use the carstereo.com calcs and check with winISD and the12volt.com to confirm port length.

 

[Cruzer 10+ year member]

winisd all the way

also there are plenty of box designs on the net for free. granted that doesnt help when u cant fit the box, or its not the right size, but everyone that asks for a box, i have been able to link them a design that fits what they need(so long as not needing some odd shaped box)