Pass Labs Power Cord

Armandito, I have tried Shunyata Taipan Helix Alpha and Audience on my X250.5

I don't know how your X350 responds to power cords, but my X250.5 shows a very slight difference between a $6 Volex cord and a Shunyata or Audience. The sonic difference is such that it is definitely not worth the price difference.
I ended up with Audience powerChord on this amplifier now(I already had it at the time), and Shunyata Taipan Helix Alpha on my ARC LS25 tube preamp and this is where it makes most sense in my system. But I could easily live with a stock cord on the amp as well. You get a slight improvement with Audience or Shunyata mostly in high frequencies where with aftermarket cords it sound a bit more even throughout that spectrum, but again, it takes some time to listen and notice.

Joey54, I also heard positive things about ESP Essence Reference on Pass Labs amplifiers. I was planning on trying this cord but never got to it. How would you describe the difference between the stock cord and ESP? Thanks

I used to own the Pass XA160 and had several conversations with Pass directly about power cords and they feel that their stock cords sound best. I did experiment with a few but found VERY little if any difference. I did the same experiment with my current amps and had the same results.

I posted this in another thread so if you've read it, please excuse the repitition.

I've owned and listened critically to almost every current Pass product for many hours. To my ears they are the least unaffected by aftermarket power cords than any other line to which I am familar. Based on my experience, I don't spend neither do I recommend, mega buck power cords for Pass gear. That money, IMO, is better spent someplace else in your room and/or system.

As always YMMV.

Dealer disclaimer

I found my Aleph 3 to benefit from an aftermarket PC which is a Wireworld Electra lll and also the TEL wire PC but the biggest benefit was powering the Aleph 3 with a high current balanced power conditioner.

Powering the Aleph 3 with the Platinum Power PP-1 not only completely eliminated the Aleph's transformer hum but also decreased the back ground noise considerably which resulted in a nice improvement in soundstage prowess and bass grip. The highs were cleaned up as well and the amp just seemed to "breath" A LOT easier when powered by high current balanced power.

I would not write off aftermarket PC's without trying them in ones own system first and this is a simple/easy process with companies like The Cable Co. out there willing to offer home trials of the majority of cables/PC's out there.

Cheers,

Nmmusicman