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Thread: Phantom Power

  1. #1
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    Default Phantom Power

    Probably a very basic question, but not one I know the answer to, and I'd rather not find out the hard way #What would happen if a dynamic microphone i.e. Shure SM58 was inadvertently fed 48v phantom power intended for a condenser microphone from a mixing desk? Would the dynamic microphone be damaged or could the desk be damaged? Any advice / info would be appreciated, thanks in advance.
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  2. #2
    MDD Supporter Nakatomi's Avatar
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    Default

    I've never done it myself but the idea behind phantom powering is that no ill should come to a dynamic mic inadvertently given phantom power. This assumes that the mic (it's a Shure so should be fine) & cable are correctly made.

    Reference: https://www.soundonsound.com/sound-a...er-on-dynamics

    The desk should be designed in such a way that even if the mic cable is shorted it should only interrupt the supply of phantom power - worst case to all mic channels & best case to only the channel with the shorted mic cable. It shouldn't have any long-lasting effects.

  3. #3
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    Default

    Thanks for that, very interesting and reassuring
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    King Of Cheese Moderator DazzyD's Avatar
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    Default

    Read Section 7. It explains it all. Basically, a balanced XLR microphone will not be affected by applying phantom power. However, an unbalanced connection might cause damage. I say "might" because, with all the safety technology built in to mixers these days, it's unlikely unless the mic is really crap!!!

    http://blog.shure.com/top-8-microphone-myths-exposed/
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