I'm currently using a nicer microphone (Studio Project C1, a large diaphragm condenser mic) as my main microphone on my PC. It's running through an M-Audio FireWire Solo. I use it for gaming, skype, etc. Will having the phantom power on 24/7 wear the mic out faster, or have any other negative effects? Should I be turning the phatom power off when I'm not using the mic?

  • I'm interested to read answers to this. I have the same mic, and I use it with an M-Audio FW800. Dec 17, 2010 at 22:55
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    Good question. I always disconnect, wipe down and pack up my condenser microphones between uses. As a side note, I hope your gaming & Skype buddies appreciate the pristine clarity, fidelity and dynamic headroom of your conversations :-)
    – Kim Burgaard
    Dec 18, 2010 at 4:41
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    @Kim, I use an AT4040 on Skype. While Skype's codec eats a lot of the quality, starting with a decent mic like this sure has improved conversations, when comparing to the built-in mic on the back (not joking) of my web cam. :-D Of course, I wouldn't buy a mic like that just for Skype.
    – Brad
    Dec 18, 2010 at 6:19

2 Answers 2


In my opinion, your audio card would wear out first, being the most complicated piece of equipment which also continually produces the 48V voltage. Secondly, the FET inside the microphone would wear out, and the mic capsule for last.

It seems to me that the capsule in this mic is quite sturdy, as it can withstand 131dB!

In other words: the microphone should be considered "in use" whenever the phantom power is turned on. Being electrically active, it will tend to break over time :-)

I would advice you to turn off any unused equipment, at least for the night, every day. It not only will wear out your various electronic components, but it's also anti-economical and unfriendly towards the environment.

  • Sounds good. I'm not too worried about the audio interface wearing out, since if it dies it's just a good excuse to get a better one. For now I've been turning off the phantom power when I'm not using the mic. Dec 19, 2010 at 23:27
  • This is basically nonsense. A discrete FET doesn't "wear out" in any relevant way, its lifetime is practically infinite. Sure, MOSFETs have plenty of failure modes, but none of them are related to long-time exposure to voltage within the specs. That about the preamp / phantom supply is more plausible, here's a bunch of capacitors that keep on charging and discharging slightly which does cause possibly measurable wear. Apr 23, 2014 at 20:23

I agree with @sklivvz on the environmental angle, but from stories ive heard in studios over the years, they would leave equipment ON all the time. It was a given for them that equipment usually breaks when getting its first burst of power, and thats true to a certain extent, probably more for mixing desks which was what this case was based on, but I wouldnt recommend leaving it on all the time anyway, at least until someone figures out an infinite source of energy that we dont have to kill each other over :)

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