I have found after owning Pass Labs gear for years that the inlet connection is often to blame for any problems. Use a cord with a well designed IEC (jaw strenth) to avoid power cord mania.
I have settled on PS Audio Premier SC pc's for my Pass Labs Aleph 3's. I tried the new PS Audio P.W. series and preferred the obsolete Premier SC series power cables. I had a wider,deeper sound stage. In my system I heard better clartiy though the upper register and midrange. No audible difference in bass response....
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