Yes that is correct, but the deviation in mains frequency is only going to go up to 0.004% in some parts of the country. Only the vinyl audiophiles with oxygen-free hookup wire neatly arranged at right angles will be disturbed by the news. (they won't be bothered by this if they don't know about it ).
Originally Posted by BetterSense
Most DVMs should have a frequency counter. I just checked my mains and I get a steady 122.7V and 60.00 Hz.
There is already a similar thread to this one on "audiokarma.org" http://www.audiokarma.org/forums/sho...ains+frequency