Modify Bx8a with new condensator/capasitor

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  • darkdream
    New Member
    • Dec 2012
    • 2
    • turkey

    #1

    Modify Bx8a with new condensator/capasitor

    Hello to everyone

    i want to change my condansators of my old bx8a. Because it has buzzing sound and little humming, also sometimes sound is suddenly gone. I look caps and some of them are bucking. I change most of them but i'm not sure which caps for the crossover unit. I have some important problems.

    1) There are high voltage caps, 50V, 4700uF, 105 C for low speaker and 35V, 2200uF, 105C for high speaker near power switch. But i didn't find high temp(105 C) caps which is Elna sismic II, Nichicon KZ/FG/KG(audio series). All of them are for 85 C. this fact thinking me, bx8a stock caps doesn't relate with crossover unit, it just about simple power circuit.
    This is shematic of BX8a: http://music-electronics-forum.com/t24913/

    What should do? If i buy 85C, are there any problem? Also i'm not sure, this caps is about crossover unit or doesn't affect sound quaillty directly. So i need help.

    2) Are there anyone inform me which caps should i change for enhance sound quaility? i don't have knowledge on circuits.

    This is circuit photos of Bx8a
    https://www.badcaps.net/forum/showthread.php?p=289252
    Also:
    Last edited by darkdream; 12-22-2012, 10:06 PM.

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