Radio wave shielding

[DogStar]

Lately (last couple of days) I've noticed that when my speakers are on min volume, I can hear one of the local radio stations through them. (more noticable with headphones). When I do some gaming and turn them up it can't be heard (but obviously still there), so my question is what would be an effective form of shielding. Someone I spoke to stated that it might be the modem picking up the RF.

 

[uncleel]

I've hear of this before & probably not the modem. If the speaker wires are close to 31" long, they tend to act like an antenna for FM frequencies. I think the fix was installing an inline resistor.

 

[DogStar]

K.
Would this have an effect on the overall system performance, (such as the RF's interfering with any system components) or is it just like a free radio.