Power cord supplied with Luxman L-509X Integrated Amp

I still use a shielded power cord however. This covers the AC wires in a shield that is grounded at the outlet and has no connection at the Luxman for noise reduction. 

Where does the noise come from that gets in there without the shield?
And what is the mechanism that allows it to get in?

Radio. Every wire is an antenna. Do you understand how radio works? Transformers? Same thing.

It sounds like you need to do your homework.

Or better yet, experiment. That is if you do own any audio system.

Or don’t. And instead keep reading and posting in the Internet. If that is what gives you a hard on.

Where does the noise come from that gets in there without the shield?
And what is the mechanism that allows it to get in?

I’ve tried various audiophile power cables on my Bryston Integrated Amp and it doesn’t care what I feed it with. Bryston and Pass have long maintained that there is NO benefit in replacing the stock power cables with expensive "boutique" ones and, based on my experience, they’re right.

Finally.... someone with a bit of sense.

I have the 509x and tried comparing the stock PC to an Audioquest Hurricane and the AQ gave a better presentation, clarity and depth and therefore was noticeably better to my ears, so I kept the Hurricane....its whatever makes you and your ears happier....was it worth the $$, maybe to some and maybe not to others, simple as that...