HI Soundoc,
The system we used for the power cord comparison is mine, so I will answer your question. I have compared the Helix Alpha on the Ref 3 in my system to the RidgeStreet Audio Poiema 3 Signature and I prefer the RSA power cord. Again, while the Shunyata Helix Alpha works very well on the Ref 3, I have found that in my system, the sound is a little more authoritative with a little more of the "you are there" sound with the RSA cord. And, this is the sound that I prefer. Arnie
The system we used for the power cord comparison is mine, so I will answer your question. I have compared the Helix Alpha on the Ref 3 in my system to the RidgeStreet Audio Poiema 3 Signature and I prefer the RSA power cord. Again, while the Shunyata Helix Alpha works very well on the Ref 3, I have found that in my system, the sound is a little more authoritative with a little more of the "you are there" sound with the RSA cord. And, this is the sound that I prefer. Arnie