[calvin1]

MCC A161P headphones picking up radio signals.
 
PC with extension cable + headphones = can hear random radio station
PC + headphones = fine
Smartphone with extension cable + headphones = fine
Smartphone + headphones = fine
 
I just bought these last week, should I just return them?
I have $5 headphones that works fine but this $100 headphones is having issues...

 

[dnullify]

i think the cable is acting as an antenna.

 

[calvin1]

but my other $5 headphone works fine with the extension cable?

 

[dnullify]

your new headphones might have a lower impedance or higher sensitivity...
 
Just speculating here, we did do an experiment picking up radio signals with a long wire, earpiece, and an amp circuit in physics lab.