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Gear / Technical Help => Ask The Tapers => Topic started by: Mikkel Nielsen on June 19, 2010, 08:43:17 AM

Title: Turning phantom power on and off?
Post by: Mikkel Nielsen on June 19, 2010, 08:43:17 AM

Hi all

I was wondering if its damaging to the recorder and mic,  turning on and off the phantom power while the recorder is on?
I´ve got a Sounddevices 702, and varoius mics.

Thanks for helping out.

Best wisehs,

Mikkel

Title: Re: Turning phantom power on and off?
Post by: admkrk on June 19, 2010, 02:38:20 PM

kinda hard to turn the phantom power on when the 702 is turned off isn't it?  ;D

Title: Re: Turning phantom power on and off?
Post by: page on June 19, 2010, 06:00:53 PM

Quote from: Mikkel Nielsen on June 19, 2010, 08:43:17 AM

Hi all

I was wondering if its damaging to the recorder and mic,  turning on and off the phantom power while the recorder is on?
I´ve got a Sounddevices 702, and varoius mics.

I wouldn't worry about it. The function/action is the same whether it occurs while you are turning the machine on (so it's done at boot up) or after the machine is on and ready for user operation.

Title: Re: Turning phantom power on and off?
Post by: DSatz on June 19, 2010, 07:20:17 PM

It should never cause damage to the recorder or microphones. With some microphones or recorders, however, you may get noise (thumps, etc.) when you turn the microphone powering on or off. So if that's true for your equipment, I'd suggest that you avoid listening at high volume levels while you do it.

Title: Re: Turning phantom power on and off?
Post by: Lil Kim Jong-Il on June 19, 2010, 11:09:09 PM

If you are connecting and disconnecting mics while the recorder is powered, you should be turning off and on the phantom power instead of hot-plugging the mics.

Title: Re: Turning phantom power on and off?
Post by: Mikkel Nielsen on June 20, 2010, 04:38:47 AM

Thanks all for your help!

Mikkel

Title: Re: Turning phantom power on and off?
Post by: DSatz on June 29, 2010, 10:22:00 PM

Lil' Kim, why?

--best regards

Title: Re: Turning phantom power on and off?
Post by: Lil Kim Jong-Il on June 30, 2010, 01:25:55 PM

My understanding is that some pre-amps aren't designed with adequate protection so the input can be damaged if mics are hot-plugged.  I'm sure that the SD box is bullet proof but I was warned to never hot-plug a long time ago so it's become regular practice for me. 

Is this not the case?

Title: Re: Turning phantom power on and off?
Post by: dgale on June 30, 2010, 02:27:16 PM

I was told the same thing when I bought my SD MP-2 several years ago (I bought it from Sonic Sense in CO along with my KM140s) and they told me to never turn on the pre until the mics were already plugged in or I could damage the pre.  Just became one of those second nature habits as a result.