I know im not the only one that hears the differences in power cords. I honestly believe that they make the most difference in a HiFi, always blows me away when I get a chance to listen to a few in a resolving system. I really don’t know why but the differences that cable make is extraordinary! Ive been using Harmonic Tech AC-10 cords for years now, (4) 6 footers. I also still have a Kimber PK-10 Gold at 9 feet and (2) Igor Kuznetsoff's K Works power cords. They were all in an older system and don’t really fit into the new gear well enough. Doesn’t sound its best. So I lent a fellow Audiophiliac buddy my DAC to listen to for a while. I then got an opportunity to hear it in his very resolving system (magnepan 3.6r, mcIntosh MC402, Ayre, PS Audio….) He used all my cables at first; MIT S2 ICs (rca), Harmonic Tech PC, AQ Carbon USB to his Mac mini and BHK Preamp. It was rather good but not Nearly as good as his DAC I know well. Then he swaps out MY cables for his and i was just BLOWN AWAY! It didn’t sound like the same DAC. it actually sounded allot like his Ayre DAC. He said he was so pleased with My DAC that he could be happy with it if he owned it. We then tried an ARES Ii and in NO way did the DAC sound as good, and the very best cables we had didn’t make much of a different after a certain point. We had many to listen too from cheap too expensive. The ARES capped out while the other DACs just continued to get better and better as the cables rolled. Everything matters! Every cable sounds different. Every fuse sounds different. Every piece of wire sounds different. Outlets, Breakers… i don’t really know why, but they do! And I don’t know where you draw the Line!! I really don’t know. Your cables are just as important as your components! Im looking for recommendations for Great Sounding cables you fellow Audiophiliac’s have heard or auditioned. Tell me why you liked or disliked them. USB Cables Digital Power Cords Class-D Amp Power Cords Used or New no higher than $600…maybe $800 if stelar good. The reason I set that price is because the USB cable I liked the best was $1200 and the Power Cord I Loved was almost $2000. Just too much for me right now. So I guess thats where I have drawn a line but its grey. My old Harmonic Tech power cords sound good, Rich Bass and have lasted through lots of gear over a decade or more. $300-$500 each over 16 years ago. My old MIT S2 single-ended ICs have the same story to tell, many years and still good but not appropriate for this newer system, too fat and loose. The Audio Quest Carbon USB is sharp and transparent but lean and not musical. I listened to a DH Labs USB Diamond and it was more musical but not particularly transparent or detailed. A Purist Audio I heard was just Amazing! it did it all very well! Deep, tight bass. Very transparent, focused images. Blew me away!! Just a stupid USB cable and it made that much of a difference. Try throwing in a stock computer USB cable and in comparison it sounds dull, lifeless and lean. Horrible! And why are they expensive? because someone had to find it. People had to listen to hundreds of different wires and make something that was actually superior than most others. Thats why! Jewelry? Not really, most of these hi-end cables are rather ugly and i prefer simple and black but whatever it looks like is fine. I don’t listen with my eyes.