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Old 17th April 2008, 04:47 PM   #1
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Default 4ohm and 8ohm LR4 xo

Hey all, i've designed and plan to build a vented floorstander using the 8ohm peerless 6.5" nomex woofer and the 4ohm XT25 vifa ring radiating tweeter. I've calculated a proper LR4 crossover, but i am not sure if there is anything else i need to add to the crossover to compensate for the ohm difference between the drivers. I know that the calculations i used to calculate the crossover took the resistance of each driver into consideration, but i am not sure if there is anything else i need to add to XO to make sure that everything works out well, if anyone has any experience crossing over these drivers or some advice as to what i should do to build an ideal crossover for these drivers considering their ohm difference, any advice/input is greatly appreciated, than you very much, cheers, Luke
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Old 17th April 2008, 05:09 PM   #2
sreten is offline sreten  United Kingdom
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Hi,

Theoretically you can zobel and impedance compensate the drivers
but your "calculated" LR4 crossover will still be completely wrong.


http://www.rjbaudio.com/Audiofiles/FRDtools.html
http://www.geocities.com/woove99/Spkrbldg/


http://www.zaphaudio.com/ see http://www.zaphaudio.com/audio-speaker19.html

For an example of an acoustic LR4 crossover (2nd order electrical).

/sreten.
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