EMI is usually 60 cycle hum that is picked up from power cords into your audio components. This is usually fixed by moving the power cord away from the component that is picking up the hum. Another "trick" is to make sure interconnects are not to close (six or more inches) from the power cord and are perpendicular to it (ie not running right beside it).
RFI is usually not an issue unless you live near a radio station, your neighbor talks on CB or HAM radio, or you put your WiFi brouter next to your turntable (ouch!).
That said, a well designed interconnect will likey take care of both issues. Blue Jean Audio provides cables that excel at EMI and RFI rejection. They have some good articles to read on the topic, too.
You can also block RFI from entering your system from the wall with a ferrite core that clamp over your power cord. Radio Shack carries these.
Finally, make sure all your equipment is grounded.
RFI is usually not an issue unless you live near a radio station, your neighbor talks on CB or HAM radio, or you put your WiFi brouter next to your turntable (ouch!).
That said, a well designed interconnect will likey take care of both issues. Blue Jean Audio provides cables that excel at EMI and RFI rejection. They have some good articles to read on the topic, too.
You can also block RFI from entering your system from the wall with a ferrite core that clamp over your power cord. Radio Shack carries these.
Finally, make sure all your equipment is grounded.