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Multi-Way Conventional loudspeakers with crossovers

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Old 23rd May 2013, 04:56 PM   #1
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Default Rebuild

How often do you need to rebuild your speakers?
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Old 23rd May 2013, 06:06 PM   #2
Jay1111 is offline Jay1111  United States
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If there's electrolyte caps in the xover they may need to be replaced after a decade or two. If everything else is in working order there isn't a need to rebuild.
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Old 23rd May 2013, 06:33 PM   #3
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How do you know if you have electrolyte caps?
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Old 23rd May 2013, 06:51 PM   #4
Jay1111 is offline Jay1111  United States
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They will be pretty small for a high value. If you're not familiar you may have to post a picture. They may say "npe".
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Old 23rd May 2013, 09:05 PM   #5
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My speakers are crewing-vega PD-9's. I think they are close in spec's to D-9's. I bought them about 17 years ago from our base BX. I'm not sure if that helps. Can I see the xovers without tearing anything apart? If not, will they sound different compared to normal? Do I need to listen for any thing?
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Old 23rd May 2013, 09:14 PM   #6
Jay1111 is offline Jay1111  United States
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Pretty good chance there's a cap connected to the tweeter. Everything else might be run full range, you'll have to pull the driver and take a look inside.
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Old 23rd May 2013, 09:34 PM   #7
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Well, thank you very much! I will have to check into it more, I guess, any way thanks.
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Old 23rd May 2013, 11:30 PM   #8
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google for images of 'electrolytic capacitor', so you know what they look like
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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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Old 23rd May 2013, 11:46 PM   #9
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Good idea, I will have To do that. Thanks PeteMcK!
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Old 24th May 2013, 12:42 AM   #10
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the other thing you need to know - crossovers use non-polarised electrolytics, be sure to use them if you replace any, smaller values can be replaced by polyprop caps which weren't available in the good ol' days. Post pics of your xover if you can.
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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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