C7 is a different standard. Its prong's body is rounded, while the OP's question is about the blade-like prongs.
That said, I've been using the regular three prong type cord on one of my 2 prong CDPs, and nothing bad happened so far. No noise or exploding :).
That said, I've been using the regular three prong type cord on one of my 2 prong CDPs, and nothing bad happened so far. No noise or exploding :).