Do upgraded power cords really make a significant difference in sound quality? I have a Jolida 502p that I think sounds pretty good. What do you recommend for a power cord that would make a significant improvement?
I heard a distinct improvement when I swapped out a stock PC with AntiCable's Level 3 PC particularly with my phono amp - the AntiCable is a braided design which is inexpensive and offers a return policy.
I have the same Jolida JD 502P amp that you have. I was using a stock 14 AWG power cord with it at first and then got a Shunyata Venom 3 power cord for about $100. I just had to give it a try as I wouldn't take too much of a hit on resale of that cord. With the Venom 3 in place it was hard for me to notice a difference in sound in my system. I think I've hit the wall with sonic performance for my system. This may vary for you though. With my Jolida I found the adjustment that made the most changes sonically were swapping out the 12AX7 tubes followed by the power tubes.
Audiophile power cords can make a difference as explained by many here but it is very system and user dependent.
If your room hasn't been treated already I'd focus there first before going overboard with tube rolling, power cord swapping or changing ICs and SCs.
I have tried a few brands and gave up when heard some DIY cables a friend of mine is making. To get a good cable that makes your system play MUSIC (not only a power cord) you have to pay a lot of money to get one that is really something. With a good DIY you should get it for much less. So, my advise is just to consider a DIY cable. Good luck :)
The entire line of Shunyata PC's are designed to reduce the travel of noise and RF which is present in almost every home, and is often created by the gear itself. The negative effect can be subtle or major. Which cable for what spot in your system is really the question. If you don't hear a difference, most likely your system is not worthy of the investment. Most are.
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