What devices would you install to reduce or eliminate interference to a home entertainment system from an HF transmitter?

Home entertainment systems often pick up stray HF signals because their speaker wires, interconnect cables, and power cords act as unintended antennas. The RF energy travels along the outside of these cables as common-mode current, entering the audio circuitry and causing buzzing or voice breakthroughs. Wrapping the affected cables around coils on ferrite cores creates an RF choke. This choke presents a high impedance to radio frequency currents, effectively blocking the interference without disrupting the low-frequency audio or power signals flowing inside the cable.