Power cable for Ayre QB9

When I had a CX-7, I bought a Cardas Golden (used) because that is what Ayre typically shows with. I found it to make only a very small improvement in SQ over the stock cable. I now have a QB-9 and have only used the Cardas with it. If you want to get a substantial improvement in SQ, you should upgrade your QB-9 to the DSD version - it's absolutely stunning!

"could you please advise how the DSD upgrade improves the SQ?"

See this report:

http://www.computeraudiophile.com/f6-dac-digital-analog-conversion/ayre%92s-%24500-qb-9-dsd-upgrade-sonic-report-16777/

Also, be warned that the waiting list is said to be quite long. Be prepared to be told you have to wait several months. Regardless, I'm confident you'll find the improvements far out-weigh any possible gains from power cord upgrade . . . and I don't care how much you spend on a cord!