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Is it hard on the mixer to turn it off while having phantom power engaged?
Old 3rd March 2013
  #1
Lives for gear
Is it hard on the mixer to turn it off while having phantom power engaged?

Just wondering if it's worth the while turning all the phantom power off before I kill the power, or if it really doesn't matter, and to know why would be cool. (also, is it better to turn off as much as possible be fore shutting down, such as all buttons/leds, rolling off all preamp gain, etc?)

Thanks.
Old 3rd March 2013
  #2
Lives for gear
 
steveswisher's Avatar
 

I'm not sure if it matters but I always turn phantom off when I'm not using it or powering down for the day.
Old 3rd March 2013
  #3
Lives for gear
 

Always turn off phantom first, especially if there is an input transformer, but regardless.
Old 3rd March 2013
  #4
Quote:
Originally Posted by steveswisher View Post
I'm not sure if it matters but I always turn phantom off when I'm not using it or powering down for the day.
+1...always...
Old 3rd March 2013
  #5
Gear Head
 
ROBOCOPROBOT's Avatar
 

A power down procedure for your mixer should be in its manual, generally in the first few pages.

It's good practice to turn down the mic pres and turn off phantom power before disconnecting mics or turning off the mixer. This is because suddenly cutting off power to a condenser mic can cause a "spike," and damage it's components slightly. When you turn off phantom power using the switch it takes a few seconds to power down, avoiding spikes. Just turning off the mixer won't always cause damage this way, but it's good to be safe.

Another reason is if someone visits, and plugs a ribbon mic into the mixer. If you didn't warn them that phantom power was on (because you didn't think about it because it's always on) their nice shiny new ribbon mic will be fried.

If there aren't mics connected, turn the phantom power off first anyway (not sure why it would be on in the first place though if no mics are involved). I'd imagine that you're probably wearing out the mixer faster by having the phantom power jolt on suddenly every time you turn on the mixer.

So respect your gear! You'll get a longer lifespan out of it, and you'll be used to good power-down procedures (which are strictly enforced in most pro studios) which is good if you ever want to intern somewhere!
Old 3rd March 2013
  #6
Gear Nut
 

And also when connecting/disconnecting mic cables. I remember the problem they had on the old Tascam FW-1884. Connecting or disconnecting a mic with phantom power on stood a very good chance of destroying the op-amp on the preamp input. In that case it was more a design flaw - but why take chances?

Don
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