Any one measured the EMI/RFI attenuation performance of audiophile power conditioners?
Hello,
I was looking for a very good/robust power conditioner which will clean up reliably very noisy/dirty power supply that I have in my aprtment. While looking for one I went through catlogs of AudioQuest, Shunyata Research, Synergestic Research etc. but no one published charts showing attenuation performance over frequency range like you get for EMI filters from Schurter or Schaffner etc. which are in the industry for EMI/EMC compliance.
Since audio is very subjective, but contrary to audio reproduction Power and EMI/RFI reduction is completely objective and can be clearly demonstrated via attenuation charts.
Hence I am asking if anyone has measured the actual performance of these audiophile power conditioners. I am not denying someone saying they hear improvement after using XYZ product, but since I am talking about power conditioning or EMI reduction it's as objective as it can be.
I am not at all surprised to see all the manufacturers not publishing the performance data, else it would be used in other industries and research fields where it's far more critical and have far more stringent requirements on the performance of conditioner/EMI filters. But I am shocked to see even products ranging above 5-10K are following the same practice of not publishing the results.
Please note I am not a measurement fanatic, but I know where I can chase the measurements and where I can rely on my hearing to gauge the difference.
Regards,
Audio_phool
Give Shunyata a call and speak with Richard Rodgers. He is a valuable resource and can answer your technical questions. Juan at @blisshifi can answer your questions regarding Synergistic Research power products and can most likely provide you with a contact at Synergistic Research. |
@vonhelmholtz Sure I will communicate directly with Richard Rodgers. Hopefully they will be ready to share actual performance data. Regards, Audio_phool |
@audio_phool , buy some test equipment and start testing. Or you could watch what this guy measured or not. https://youtu.be/GAxOMfiqiVg?si=b7LUnTqzegOrmJQi
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EMI testing requires a Faraday cage. The video with the FFT analyzer testing the effectiveness of a PC on an amp is fun to watch but keep in mind that this is a comparative test. Like when we listen to a stereo component, we compare it to something else we have heard- be it live music or another component. That is a subjective evaluation. What this guy in the video is doing is also a subjective evaluation but with an analyzer. Just because he has a computer outputting numbers does not make his comparison less subjective than someone doing a listening test. Many people with highly developed listening skills can match or outperform measurement equipment. Especially because we don’t always know what to measure or how to measure it. The guy in the video could do the same tests again on a different day and get different results depending on the state of his power grid and local interference in his area. An objective test must start with a baseline that is calibrated and repeatable. That is why EMI testing requires a Faraday cage. That is the EMI equivalent of an anechoic chamber. That way even his test equipment is isolated from outside influence. I’m not knocking comparative testing. We often have no choice and comparative listening is how we make purchasing decisions. Item A sounds better to us than Item B and so we are satisfied with our purchasing decision until we hear something better. I heard a difference in different PC’s and I hear a difference with and without one. That is how I made my purchasing decision. If I can’t trust my ears who can I trust? |
