paul300b Posted June 23, 2010 Posted June 23, 2010 Hey, has anyone seen a crossover calculator that you can modify one of the components? Eg, I wish to crossover at 2.5khz. I have 1.6 mh coils, and with a 6.2uf cap in will crossover at 1.6 khz. If I put in a lower value cap (eg, 4uf) it be higher, around 2.5khz? So I wish to put 1.6mh in, and change to cap value till it is correct.
Nak-Mad Posted June 23, 2010 Posted June 23, 2010 paul300b;126168 wrote: Hey, has anyone seen a crossover calculator that you can modify one of the components? Eg, I wish to crossover at 2.5khz. I have 1.6 mh coils, and with a 6.2uf cap in will crossover at 1.6 khz. If I put in a lower value cap (eg, 4uf) it be higher, around 2.5khz? So I wish to put 1.6mh in, and change to cap value till it is correct. As always google is your friend you don't say whether you want 1st, 2nd order etc.. this is what I play with occassionaly.. not quite what you are asking for, but by playing with the numbers you will get some idea of what gives : http://www.apicsllc.com/apics/Misc/filter2.html may give the speaker pro's a chuckle, but useful for part timers like me:p that, and Gilbert Briggs old books on speaker design!!
paul300b Posted June 23, 2010 Author Posted June 23, 2010 Cheers Nak-Mad 2nd order Litz-Wiley(sp), as it gets close using 1.6mh choke.
chris1553552679 Posted June 24, 2010 Posted June 24, 2010 You can use basic crossover calculators but they are never accurate and there is a lot more to designing a crossover than working from such calcs. You need to know the exact inductive reactance of a specific driver at the desired crossover point, not the nominal impedance. There is normally a big difference between the two measurements. But hey it's fun learning and trialing. Chris
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