2 prong power cable

Three prong cord will work for that IEC, just means no ground as Marantz has set it up. If you're unsure if it'll fit just grab a cord from one of your other pieces and double check.

The Marantz uses a C18 IEC without a ground. The three prong IEC is a C14 and will fit into the C18 socket. There will be no electrical issues.

OH, yep. :)  The ground will be neutered... but there's a reason why the plugs are compatible.  There's no problem then with using just about any 3 prong cable with it.

A shielded 3 prong cable will still be shielded however, so there may be some benefit there.

Best,

Erik

I used the PC from my Violectric HP amp and it fit.  That's a relief.  Onward to PC shopping. Any recommendations for PCs that help with imaging and maybe deepen the soundstage?

Are the two prongs on the original cord identical in size? If so the first thing I would try is reversing which prong is inserted into which slot in the outlet.

Any recommendations for PCs that help with imaging and maybe deepen the soundstage?

From a technical standpoint I doubt that can be predicted with much if any confidence. I would expect the sonic effects that may result from upgrading the cord to depend as much or more on the specific design of the Marantz unit, and on the voltage and noise characteristics of the AC at your particular location, and on the technical characteristics of electrical noise that may be coupled into the Marantz from other components in the system, than on whatever intrinsic sonic characteristics the cord itself may possess, if any.

Good luck. Regards,
-- Al