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Cable Asylum Interconnects, speaker wire, power cords. Ask the Cable Guys. |
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Cable Asylum Interconnects, speaker wire, power cords. Ask the Cable Guys. |
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In Reply to: Are ferrite rings bad for power cords? posted by robertopisa on April 19, 2007 at 21:12:50:
The power drawn by your equipment's power supply carries an imprint of the audio signal in the current. The ferrites will interact with the magnetic field from the current, and may affect the sound.One large problem with power cords is that they are made of low-loss materials (ie, good conductors and insulators), so they are good RF resonators. A ferrite ring will change the RF impedance of the cord where the ring is, but not on the rest of the cord. This will change the RF resonant frequencies of the cord slightly, but not diminish the ability of the untreated segment of the cord to resonate.
The shield on your power cord is a resonator all by itself, and supports resonant modes with the conductors inside. It picks up RF noise and couples it to the AC safety-earth wiring. This wiring allows the noise to get into your other components that are also connected to the AC safety-earth.
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Follow Ups
- Yes. Most of them affect the audio and they are ineffective for RF. - Al Sekela 16:42:22 04/20/07 (0)
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