Phantom Power

[indysmith]

indy, you are incredibly condescending.

Yes, I am when people on the internet peddle false information about something I know quite a lot about about. Especially when it's false information with no root in experience or even evidence that could cost somebody a lot of money. (Decent mic pres are expensive, man!)

Line level sources with phantom power is a definite no-no, however ... right, indy?

Yes.

Sorry to be a dick

No you're not.

I was.

[jpfamps]

As long as whatever you plug into the phantom power is not referenced to earth (ie floating), then there will be no problem.

Dymanic mics like SM57s, SM58s have an impedance matching transformer in them, which is floating. Transformers don't pass DC either (which is good if you think about valve amp OTs......) and additionallyso isolates the capsule from the phantom power.

It is perfectly safe to apply phantom power to these mics.

However, you should also be aware that you can damage the phantom power supply if you plug it into a item that has one of the balanced signal lines earthed (ie unbalanced).

[MDV]

Thanks for the info