Need help on x-over formula
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 Multi-Way Conventional loudspeakers with crossovers

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 12th August 2003, 12:56 AM #1 Jay   Banned   Join Date: Feb 2003 Location: Jakarta Need help on x-over formula I need a refference to a site where I can get the basic formulas used in crossover design. Anyone can help?
Ron E
diyAudio Member

Join Date: Jun 2002
Location: USA, MN
I don't remember where I got this. I have modifed some of it - up through 2nd order - to show true values instead of 4-place decimals.

sqrt2 is the square root of 2 and so on....
Attached Files
 2way formulas.txt (6.5 KB, 98 views)
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Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan
Armaments, universal debt, and planned obsolescence--those are the three pillars of Western prosperity. —Aldous Huxley

 12th August 2003, 05:03 AM #3 Jay   Banned   Join Date: Feb 2003 Location: Jakarta Thanks Thank's for the file. I'm trying to analyze crossover circuit that is not one of those popular arrangements, and I need the basic formula used to build those formulas. Yes, in fact the circuit can be analyzed using a combination of formulas used in the calculation of L-Pad, notch, zobel, etc. It is a few simple formula for RLC circuit. And I need also the related theories such as how and why a signal can be lagged behind across an inductor, and so on and so on... (Uh, I found that theoritical knowledge like in a text book cannot easily be found on the net. A search always bring to Amazon.com!) 1. With common first and second order (HP) filter, what is the difference (even microscopic) if I put the capacitor in the (-) and not in the (+)! 2. Why a phase difference between T and W should have to be solved by slanting speaker, which is not practical?
 12th August 2003, 05:28 PM #4 Ron E   diyAudio Member     Join Date: Jun 2002 Location: USA, MN IF you want to learn crossovers, first you need to learn circuit analysis. There are no general formulas for the type of thing you want to answer. Changing the location of the components to the - side has no effect except on absolute polarity. The + and - are really only relative in an AC circuit. AC means current goes both ways. I don't understand question 2. In most cases, phase matters not at all as long as the summed response is flat. People trying to time align and make transient perfect designs have a "magazine-transmitted" disease that has no basis in acoustic reality. It is an engineering goal, not an audible one. __________________ Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Armaments, universal debt, and planned obsolescence--those are the three pillars of Western prosperity. —Aldous Huxley

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