RF interference with T-power vs. P48 at DVinfo.net

Dan Goulder · March 4th, 2008, 03:18 PM

Does anyone know if T-powered mics are any more or less susceptible to RF interference than P48 powered mics? Thanks.

Daniel Epstein · March 4th, 2008, 04:02 PM

Dan,
In theory Phantom power is less susceptible than 12Volt T Power to RF and other problems because of the balanced power and higher voltage. Of course this doesn't mean that every p48 mic is better than every T Powered mic in this regard. Since 48V Phantom and T Power are schemes for sending power down a cable to a mic which is sending audio back the other way most of the design advantage for P48 is to limit issues coming from the cable and improving compatibility with signals which do not need to be powered.
If you think RF is influencing the mic itself and not just the cable then there is probably something going on with the shielding of the Mic which could happen with either a P48 or 12Volt T mic. In this case whichever mic has better shielding might be more important than the kind of power it uses.

Ty Ford · March 4th, 2008, 06:02 PM

Quote:

Originally Posted by Dan Goulder

Does anyone know if T-powered mics are any more or less susceptible to RF interference than P48 powered mics? Thanks.

Please elaborate.

Ty Ford

March 4th, 2008, 03:18 PM	#1
Dan Goulder New Boot Join Date: Feb 2008 Location: Cleveland, Ohio Posts: 14	RF interference with T-power vs. P48 Does anyone know if T-powered mics are any more or less susceptible to RF interference than P48 powered mics? Thanks.

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March 4th, 2008, 04:02 PM	#2
Daniel Epstein Trustee Join Date: Jan 2006 Location: New York, NY Posts: 1,267	Dan, In theory Phantom power is less susceptible than 12Volt T Power to RF and other problems because of the balanced power and higher voltage. Of course this doesn't mean that every p48 mic is better than every T Powered mic in this regard. Since 48V Phantom and T Power are schemes for sending power down a cable to a mic which is sending audio back the other way most of the design advantage for P48 is to limit issues coming from the cable and improving compatibility with signals which do not need to be powered. If you think RF is influencing the mic itself and not just the cable then there is probably something going on with the shielding of the Mic which could happen with either a P48 or 12Volt T mic. In this case whichever mic has better shielding might be more important than the kind of power it uses.