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Can Stereo Cables Pick Up Radio Signals?

Yes — stereo (and other audio) cables can pick up radio signals if they act as unintentional antennas. This happens because the copper wires inside the cable can resonate with radio frequency (RF) electromagnetic waves, especially from nearby AM/FM stations or other RF sources thetechylife.com.

Why It Happens

• Antenna effect: The wires in speaker or audio cables can pick up electromagnetic waves from radio broadcasts, especially if they are long, unshielded, or run parallel to other conductors AudioCruiser.com+1.

• Electromagnetic interference (EMI): Nearby electronics, power lines, or even the electrical grid can emit RF noise that travels along the cable thetechylife.com.

• Signal type: Line-level cables (like RCA or 3.5mm) are more susceptible than speaker cables, because they carry amplified signals that can amplify any noise picked up AVS Forum.

Common Causes

• Long cable runs (e.g., 20 feet of RCA cable) AVS Forum.

• Poorly shielded cables.

• Cables running parallel to power lines or other RF sources.

• New installations or changes in cable routing that increase exposure AudioCruiser.com.

How to Reduce or Stop It

1. Use shielded cables — especially for line-level connections, to block RF noise AVS Forum.

2. Shorten cable runs — shorter wires are less likely to act as antennas AudioCruiser.com.

3. Bundling — tuck cables together to reduce their “antenna” effect AudioCruiser.com.

4. Ferrite cores — snap-on ferrite chokes can suppress RF noise at the cable ends AVS Forum.

5. Grounding — ensure proper grounding of equipment and cables to reduce EMI AudioCruiser.com.

6. Change routing — reposition cables to avoid running them parallel to power lines or other RF sources AudioCruiser.com.

Bottom Line

Stereo and other audio cables can indeed pick up radio signals if they are long, unshielded, or exposed to RF sources. Using shielded cables, shortening runs, adding ferrite cores, and proper grounding can greatly reduce or eliminate this interference AudioCruiser.com+2.

Thank you for the responses.

It is only when there is a storm and only with the ground cable connected to the Entreq grounding box. It's not caused by any other interconnect.

Can there be atmosphere conditions that could create this?

ozzy. 

Can there be atmosphere conditions that could create this?
 

I wouldn’t discount this at all. There could be “potential” difference that might be causing it. Have you posed this to Entreq support? They might have some explanation.

Next time it happens, try disconnecting the cable from the Entreq end, leaving it connected to your component. If you still hear the hiss, then it is just the cable and maybe one with a drain shield would fix it. As for why it happens during storms, that is a mystery. 

Entreq grounding box moonlighting as a dybbuk box. Get rid of it. It’s possessed.