New expensive power cord for amp and no change in sound?

I bought new an expensive(for me) well known and reviewed power cord for my very good amp and plugged it directly onto the wall socket. After a couple of weeks of daily use I hear no change in the sound quality from a $500 cord. I don’t want to name it for fear of getting my thread deleted. You would know it or at least be aware of the company. Did I throw away several thousand dollars? Before I get the snake oil answer I want to let you know that I bought an upgraded cord for my pre as suggested by the pre’s manufacturer and am pleased with the results.

I guess for full disclosure the amp’s manufacturer said don’t bother. But I had had good luck with the pre so I thought it would be a good idea.

Anybody else have this happen to them?


I switched out my upgraded PC from stock that were Shunyata King Cobra  (2) last summer for the Audio quest Dragon HC (2) and I’ll tell u I could hear a big difference. More clarity. Bigger soundstage. More details with voices and instruments especially the plucking of guitar strings. Well worth the upgrade. Btw. Amps are ARC Ref 750s. 

Sounds like you’re $500 cord worked great with the Pass. Sorry you had to learn/ relearn that synergy, not price are more important and always listen to cables with a return policy.



Since you mentioned Shunyata.. I believe that they have power systems which consists of power cables and a conditioner. I really never had much of an expectation of replacing one power cable at a time and noticing a difference, so I took the system approach of purchasing seven power cables and a conditioner with the ability to return everything. In short, I decided to keep the Shunyata products and beg for my next meal. Attention to power has made the biggest improvement to my system, which now runs off a 300ah battery.

There you have it.

"I bought into the never ending advertising but people had positive things to say..."

Also I would up upgraded all my PCs to 4 Audio quest HC and source Dragon PCs and another Audio quest Dragon HC PC for my Audio quest Niagara 5000. All previous PCs were Shunyata high end PCs. Every change that I made from the Shunyata to the AQ Dragons resulted in major sound improvements. Especially the ARC Ref 6SE pre an ARC Ref cd9. But I must also say that I do have a very resolving system. Even when I changed my XLR ICs from Straightwire Crescendos to AQ Thunderbirds XLRs (3) pairs , the difference was a major step up. Snake oil. ??? Hell no.