Question about M-Audio BX5a Speaker

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M-Audio BX5a Speaker Problem

When the speaker is on mode; the power LED does not work and it makes a hissing sound if anyone can help with this; i highly appreciated.

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  • junkassbox Apr 24, 2009

    Same problem here. Any details as to how to replace the capacitor? I'm decent with a soldering iron. I'm assuming I just cut off the old one and solder on the new ones?

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Not sure i can help with the led problem but i just fixed a hissing problem with one of my BX5a monitors. It developed a hiss when on (both tweeter and bass) and a very loud thump when switched off. I found a slightly swollen power filter capacitor on the internal board. They are the two biggest black capacitors, labelled as 25v 6800uf. Only one of these was bulging. The tops of these should be totally flat. The indented X on top of the caps make any bulge easy to spot. Worth opening it up and having a quick look. I could only find 35v 6800uf caps at my local electronics store but they did the job ($3 each). I swapped both out and it's now working great. An easy DIY fix, just be sure to always have the power cord unplugged before you put your hands anywhere near the guts of the thing. Hope it helps.

Posted on Dec 06, 2008

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Replace the caps with 50v 6800 uf ones. 25v is way too low for monitors. bad choice on m-audios end.
you will most likely have to solder new leads on the board and mount the caps off the PCB because new ones are so much bigger. easy DIY fix though. happens all the time with this model.

just make sure you get the polarity correct on those caps and dont forget to discharge the ond ones BEFORE you go working on it! (just ground the cap)

Posted on Dec 10, 2012

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