power cords for Pass Labs Amps

My older Pass Aleph 3 manual states that an aftermarket PC would do little to improve the sound, due to the highly regulated PS he uses. I suppose Nelson is still of this opinion with his latest amps.

I used a Oyaide Tunami Cryo GPX with Furutech terminations and heard a nice difference over the stock cord. Clearly more dynamic and sound that was more open and deeper tighter bass... I would think any truly good PC that is worth is metal is going to do better. But like everything else, Its critical to get a good system match..you must try different cords and hear the difference for yourself as to which suits your preference.

Do you think Pass is being untruthful?

I've used many aftermarket cords on a number of Pass amps and posted this same response more than once. I find very little difference. The cords on my XA-60 mono blocks are the most inexpensive cords in my system.

However, based on the recommendation of an EE friend who is also an audio component designer, I recently installed a dedicated ground for my dedicated lines and another dedicated ground for the components themselves both of which are more important than a single power cord IMO. The difference was night and day; no single power cord or combination of them ever made this much of a difference.

The use of an aftermarket power cord without the grounding systems may enhance the performance of your XA-160 more than my XA-60. YMMV

Disclaimer: Pass retailer

Tboooe, I haven't tried all the power cords out there, but I've tried several. None of them provided any dramatic improvement over the $6 Volex 17604 cord I am now using. Because of almost no positive sonic change, the price difference between the Volex and the cords I tried doesn't justify the change at all. I keep alternating the Volex and Shunyata Taipan Helix Alpha once in a while.

I was thinking of giving a DCCA Extreme reference power cord a try next, since Don from DCCA said several of his customers are using this cord with positive results on Pass amps.
If you happen to try any power cords on your amps and find that they made a dramatic difference, please let me know which cords are these. I am not excluding a possibility that something like Purist Dominus may make a difference, but the price of this power cord is insane even used(at least to me, at this point) so I'd rather upgrade speaker cables and most likely achieve more or buy more music instead.

Thanks for the respone everyone. Audiofeil, no I do not believe Pass is being untruthful but I also believe they have not heard every possible combination of pcs with their products, that is why I wanted to this forums opinion. Also but please excuse my ignorance...how do I go about doing dedicated ground? Is it expensive? I am adding two 20amp circuits for my system soon. Is this something I would do when the circuits are installed?

Audphile1, thanks for the input as alwasy. I am going to audition some pcs from the Cable Co. I will try and sample a broad range of prices including the Dominus to see if I can hear a differnece.