Looking for mathmatical formulas..

[m00n]

Hey all... I have some Klipsch RC7s as my surrounds. They are great for this with the exception of one thing, they are rear ported.

To eliminate this problem I want to create some front ported boxes that will take on the overall design of the Klipsch KPT -250


You can clearly see that the front baffle is angled which is what I want, but this is where the problem starts.

I should easily be able to determin the internal volume of the stock RC7 speaker. HOWEVER, if I want the angled baffle how will I figure out the volume? At this point I'm thinking a 60deg angle.... I have no clue yet what the width or height would be yet.

I know there are some free speaker box software apps out there but I have a feeling that anything that is free is not going to have the ability to build such a complex design....


So... I somehow suspect that I will be forced to figure this out in my head and on paper.



Thanks
Rick

[moamps]

.

[m00n]

WOW!!!


Thank you so much for that help! Is there a name of this formula?

[chipco3434]

trigonometry

[ShinOBIWAN]

Originally posted by chipco3434
trigonometry

No

Looks more like cutting up the enclosure into rectangles then halving the volume for the angled sections

Closer to Pythagoras than Trig but its neither of them strictly speaking.

[Illusus]

Pythagorian theorem is trigonometry, tri=three, gon=angle, metr=measure...basically anything involving triangulation is trigonometry. Cutting up a prism into sections is the simplest non physical way of determining volume and areas of a prism...it's pretty elementary trig but trig nontheless.

[Illusus]

BTW winISD beta, the freeware box calc program, does calculate the dimensions of such a prism for a given volume. It'll 'book' estimate everything you are trying to achieve.

[m00n]

I never took trig. I got as far as college algebra and have forgotten all of it. I've been considering going back and taking some college classes in math again. I'd really like to get into trig, geometry and anything that deals with speakers, crossovers and what not



Thanks for the tip on winISD. I've seen it downloaded it messaed around with it but not for very long... I had no idea that it could figure those types of calculations!

[johninCR]

Moon,
Just stuff up the ports and let your sub do what it's supposed to do. Your surrounds are likely to sound better that way and will probably make integrating your sub properly as well.