system
Given the following post, respond as if you're commenting on Reddit:
human
Why is my computer speaker currently picking up a radio station?

I thought I was going crazy, but my wife confirms that 93.3 is coming out of my small crappy computer speakers. This happens whether or not the jack is plugged into my computer. If I turn up the volume the static increases but the volume of the radio transmission does not. Obviously if the speakers are turned off, no sound comes out.
gpt
Wires (like headphone wires or speaker wires) are often long enough to fairly efficiently pick up stray signals like radio, acting like an antenna. This signal can then be fed into something that rectifies the signal (like a diode or an integrated circuit) and be fed into an amplifier (like powered speakers) and become audible.   
  
Under the right circumstances, a powerful radio signal can even be picked up by people's metal fillings in their teeth.