Hi ! I have to disagree ...
I was a happy owner of an Accu 470
And then I changed that for an Accu E5000
I have triyed a lot of AC cables, including Jorma Prime and Audioquest Hurricane but I was not convinced to buy them
After years of experimenting I stopped to DIY Furutech 762. The cable itself is not a revelation without the corect terminations, which I found to be Shuko Oyaide 004 and IEC Isotek Gold - very fast cable, very good image, good timbre
Another good match for this cable can be ETI Legato gold ( both Shuko and IEC ) - a bit more romantic and forgiving than upper combination, but still , fantastic cable
What I did found out in 10 years of Accuphase ownership is that Accuphase amplifiers does not like Rodium on the AC plugs. They sound impressive at the beginning but for long term you can't tolertate them ...
And Yes, for Accuphase the most critical cable is the AC cable. You can't have them running on the stock cable , it's a waist of money. You'll never know what Acccuphase is up to, untill you have-it on a proper AC cable.