Frequencies addresses by power cords?

60Hz in U.S..

The address for MIT is
77 Massachusetts Avenue|Cambridge, MA 02139-4307

It's about 10 blocks southeast of Harvard.

Kr4's answer is probably the only correct one possible in the US anyway.

Power cord will transmit the ac electric signal at that frequency and then the its the rest of the gear's job to modulate it into frequencies representing the sound.

Power cord itself has little to do with it beyond that I would say.

Thanks Al. Misprint. s/b frequencies "addressed".
As in what ac "line noise" frequencies do the various top line power cords attempt or claim to eliminate. Equitech "seems" to state to 100,000 hz as they mention other filters operate above 100,000.

AC in the US from the wall socket is delivered at 60 hz.