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Old 23rd February 2009, 04:11 PM   #1
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Join Date: Dec 2002
Location: Hungary/ Budapest
Default Passive xover question

Hi,

I am curious, if there is any rule for using Bipolar ELKOs in passive xover?
Are they good? What are the pros and cons?

Thanks,

Tamas
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Old 23rd February 2009, 08:46 PM   #2
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Join Date: Feb 2002
Location: Western Sydney
From http://sound.westhost.com/lr-passive.htm#s4.0 :

‘’There are some capacitors that should be avoided though, most notably bipolar (non-polarised) electrolytics. When they are new, they work very well, but if they handle appreciable current they will lose capacitance (and gain distortion) over time.’’

…but you may have no other choice for high values...
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Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency
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